200
200 is the HTTP status code meaning OK — the request succeeded.
- Even
- Composite
Where 200 fits
Why 200 is special
200 is the code almost nobody sees, because it means nothing went wrong. Every successful page load, image fetch and API call in the web's history has carried it. It anchors the 2xx family the same way 404 anchors the 4xx family: the first digit carries the meaning, and 2 means success.
Same number, different meanings
How 200 is understood across different contexts — never implying one meaning because of another.
- Mathematics
200 is the code almost nobody sees, because it means nothing went wrong. Every successful page load, image fetch and API call in the web's history has carried it. It anchors the 2xx family the same way 404 anchors the 4xx family: the first digit carries the meaning, and 2 means success.
- Technology & computing
CWE-200 is exposure of sensitive information to an unauthorised actor. It covers verbose error messages and debug endpoints as well as deliberate data leaks.
- Science
There are more than 200 million chemical substances on the CAS registry. Figure as of 2024. The registry began in 1965 and reached its hundred millionth substance in 2015; the second hundred million took under a decade, so the rate of addition is itself accelerating.
- Geography
There are roughly 200 thousand glaciers on Earth (worldwide, excluding the Greenland and Antarctic ice sheets). Counted from satellite outlines in the Randolph Glacier Inventory. The count is not the interesting figure and the area is: the same inventory is what makes it possible to say how much of it is disappearing.
- Sport
The 200 metres is run round a single bend, which is why lanes are staggered and why the outside lanes are considered harder despite covering the same distance: a wider bend is faster to run but leaves the athlete unable to see the field. It is the only individual sprint that combines a curve and a straight.
Not just a mathematical number
200is also used in ways where ordinary arithmetic doesn't apply — each listed below with what genuinely does and doesn't follow from it.
- Mathematical number
A genuine quantity — its mathematical properties (prime, square, factors, and so on) are real facts about it.
A genuine quantity that ordinary arithmetic applies to — it can be prime, even, a perfect square, added to another number meaningfully, and so on.
- Code
Also used as a code — HTTP status codes.
An assigned identifier from a fixed registry or standard — its digits don't represent an amount, and arithmetic on it is meaningless (HTTP status 404 + 1 is not a 'better' status; it's a different, unrelated code).
Factors & digit properties
- Divisors (12)
- 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200
- Prime factorisation
- 2^3 × 5^2
- Digit sum
- 2
- Digital root
- 2
Representations
- Decimal
- 200
- Scientific notation
- 2.000 × 10^2
Roman numerals
C C
Binary
1 1 0 0 1 0 0 0
1 × 128 + 1 × 64 + 0 × 32 + 0 × 16 + 1 × 8 + 0 × 4 + 0 × 2 + 0 × 1 = 200
Octal
3 1 0
3 × 64 + 1 × 8 + 0 × 1 = 200
Hexadecimal
c 8
c × 16 + 8 × 1 = 200
Read as powers of two: 128 + 64 + 8 = 200.
In historical numeral systems
Egyptian
2 coils of rope
2 × 100 = 200. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
3 vertical wedges (sixties place), 2 corner wedges (units place)
3 × 60 + 20 = 200. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
sigma, marked as a numeral
sigma + keraia
A single letter, sigma, marked with a keraia to show it is a number rather than a word.
Hebrew numerals
resh
resh
Maya
2 bars (upper, twenties place) over shell (zero) (lower, units place)
10 × 20 + 0 = 200. Places stack vertically with the smallest at the bottom, so the upper group is worth twenty times the lower.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Abundant number
- Powerful number
- Harshad (Niven) number
Related numbers & connections
The two sprint distances, and the reason lane draw matters differently in each. The 100 is run entirely on the straight with no bend at all; the 200 adds a curve, which is why its lanes are staggered and why the outside lanes trade a faster bend for a blind race.
View 100 →The two ends of the outcome space: the request succeeded, or the server failed while handling it.
View 500 →Numbers Around Us
- appears alongside100
why?
Strength 0.50, confidence "high".
- appears inEarth
why?
Strength 0.50, confidence "high".
- appears inNumbers assigned as identifiers
why?
Strength 0.50, confidence "high".
- appears inHTTP status codes
why?
Strength 0.50, confidence "high".
Technology & computing
CWE-200 is exposure of sensitive information to an unauthorised actor. It covers verbose error messages and debug endpoints as well as deliberate data leaks.
DocumentedTechnology & computingGeography: International — MITRE CWEPeriod: 2006–HTTP's first digit carries the meaning: 2 is success, 3 redirection, 4 a client error, 5 a server error. 200 is the plain success case, which is why it is the most-issued status code in the web's history and the one users never encounter — browsers only surface a status when something has gone wrong.
DocumentedTechnology & computing
Science
There are more than 200 million chemical substances on the CAS registry. Figure as of 2024. The registry began in 1965 and reached its hundred millionth substance in 2015; the second hundred million took under a decade, so the rate of addition is itself accelerating.
DocumentedScienceGeography: worldwide
Geography
There are roughly 200 thousand glaciers on Earth (worldwide, excluding the Greenland and Antarctic ice sheets). Counted from satellite outlines in the Randolph Glacier Inventory. The count is not the interesting figure and the area is: the same inventory is what makes it possible to say how much of it is disappearing.
DocumentedGeographyGeography: worldwide, excluding the Greenland and Antarctic ice sheetsThe discharge of the Amazon into the Atlantic is about 200 thousand cubic metres per second (South America). About a fifth of all river water reaching the sea, and more than the next six largest rivers combined.
DocumentedGeographyGeography: South America
Sport
The 200 metres is run round a single bend, which is why lanes are staggered and why the outside lanes are considered harder despite covering the same distance: a wider bend is faster to run but leaves the athlete unable to see the field. It is the only individual sprint that combines a curve and a straight.
DocumentedSport
Common questions
Is 200 a prime number?
No, 200 is not prime.
What are the factors of 200?
The factors of 200 are 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200.
What is 200 in Roman numerals?
200 in Roman numerals is CC.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 6 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026