250
+250 is the international calling code for Rwanda.
- Even
- Composite
Where 250 fits
Why 250 is special
Rwanda is among the most densely populated countries in Africa and has rebuilt state institutions since 1994 in ways studied and contested in equal measure.
250 connects to:
- 257 — is adjacent to
- numbers in space — appears in
Same number, different meanings
How 250 is understood across different contexts — never implying one meaning because of another.
- Mathematics
Rwanda is among the most densely populated countries in Africa and has rebuilt state institutions since 1994 in ways studied and contested in equal measure.
- Everyday life
Sodium nitrite makes cured meat safe from botulism and is associated with nitrosamine formation. Removing it would reintroduce a lethal risk to remove a statistical one, which is why it remains in use.
- Technology & computing
Ferrari 250 GTOs have sold at auction for sums exceeding fifty million United States dollars, among the highest prices recorded for any motor vehicle. Thirty-six were built between 1962 and 1964.
- Science
There are about 250 million years in one orbit of the Sun around the centre of the galaxy (the Milky Way). Sometimes called a galactic year. The Sun has completed roughly twenty of them since it formed, and about one since the earliest dinosaurs.
- Sport
There are roughly 250 million people who play football. Figure as of 2006. From FIFA's own survey, the last of its kind at this scale. It counted 270 million people involved in the game once officials and organisers are included.
- Geography
+250 reaches Rwanda, one of the most densely populated countries in Africa. Its post-1994 reconstruction is widely cited both as a development success and as an authoritarian one, and both readings are argued from the same record.
250 is part of
Factors & digit properties
- Divisors (8)
- 1, 2, 5, 10, 25, 50, 125, 250
- Prime factorisation
- 2 × 5^3
- Digit sum
- 7
- Digital root
- 7
Representations
- Decimal
- 250
- Scientific notation
- 2.500 × 10^2
Roman numerals
C C L
Binary
1 1 1 1 1 0 1 0
1 × 128 + 1 × 64 + 1 × 32 + 1 × 16 + 1 × 8 + 0 × 4 + 1 × 2 + 0 × 1 = 250
Octal
3 7 2
3 × 64 + 7 × 8 + 2 × 1 = 250
Hexadecimal
f a
f × 16 + a × 1 = 250
Read as powers of two: 128 + 64 + 32 + 16 + 8 + 2 = 250.
In historical numeral systems
Egyptian
2 coils of rope, 5 hobbles
2 × 100 + 5 × 10 = 250. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
4 vertical wedges (sixties place), 1 corner wedge (units place)
4 × 60 + 10 = 250. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
sigma, then nu, marked as a numeral
sigma-nu + keraia
sigma + nu written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
resh, then nun
resh-nun
resh (200) + nun (50) = 250, written in descending order.
Maya
2 bars + 2 dots (upper, twenties place) over 2 bars (lower, units place)
12 × 20 + 10 = 250. 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
- Deficient number
Related numbers & connections
Rwanda and Burundi share a border, a language family and a colonial history, and both are among the most densely populated countries in Africa.
View 257 →250 appears in Numbers in space, the topic covering numbers that carry a documented astronomy fact.
Nearby in a sequence
- is adjacent to257
why?
Strength 0.50, confidence "high".
Numbers Around Us
- appears inSpace and astronomy
why?
Strength 0.50, confidence "high".
Everyday life
Sodium nitrite makes cured meat safe from botulism and is associated with nitrosamine formation. Removing it would reintroduce a lethal risk to remove a statistical one, which is why it remains in use.
DocumentedEveryday lifeGeography: European Union and United Kingdom
Technology & computing
Ferrari 250 GTOs have sold at auction for sums exceeding fifty million United States dollars, among the highest prices recorded for any motor vehicle. Thirty-six were built between 1962 and 1964.
DocumentedTechnology & computingGeography: ItalyPeriod: 1962–1964
Science
There are about 250 million years in one orbit of the Sun around the centre of the galaxy (the Milky Way). Sometimes called a galactic year. The Sun has completed roughly twenty of them since it formed, and about one since the earliest dinosaurs.
DocumentedScienceGeography: the Milky Way
Sport
There are roughly 250 million people who play football. Figure as of 2006. From FIFA's own survey, the last of its kind at this scale. It counted 270 million people involved in the game once officials and organisers are included.
DocumentedSportGeography: worldwide
Geography
+250 reaches Rwanda, one of the most densely populated countries in Africa. Its post-1994 reconstruction is widely cited both as a development success and as an authoritarian one, and both readings are argued from the same record.
DocumentedGeographyGeography: Rwanda
Common questions
Is 250 a prime number?
No, 250 is not prime.
What are the factors of 250?
The factors of 250 are 1, 2, 5, 10, 25, 50, 125, 250.
What is 250 in Roman numerals?
250 in Roman numerals is CCL.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 5 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026