50
50 is the atomic number of tin, and the number of US states.
- Even
- Composite
Where 50 fits
Why 50 is special
50 marks a half-century in age and anniversaries, and — since 1959 — the complete count of US states.
Same number, different meanings
How 50 is understood across different contexts — never implying one meaning because of another.
- Mathematics
50 marks a half-century in age and anniversaries, and — since 1959 — the complete count of US states.
- Science
50 is the atomic number of tin.
- Geography
The United States is made up of 50 states, the last two — Alaska and Hawaii — admitted in 1959.
Factors & digit properties
- Divisors (6)
- 1, 2, 5, 10, 25, 50
- Prime factorisation
- 2 × 5^2
- Digit sum
- 5
- Digital root
- 5
Representations
- Decimal
- 50
- Binary
- 110010
- Octal
- 62
- Hexadecimal
- 32
- Roman numeral
- L
- Scientific notation
- 5.000 × 10^1
Other mathematical patterns
- Deficient number
- Harshad (Niven) number
Related numbers & connections
25 is a factor of 50 (25 × 2 = 50).
View 25 →Mathematically related
- has factor25
why?
Strength 0.50, confidence "high".
Science
50 is the atomic number of tin.
DocumentedScience
Geography
The United States is made up of 50 states, the last two — Alaska and Hawaii — admitted in 1959.
DocumentedGeographyGeography: United StatesPeriod: 1959
Common questions
Is 50 a prime number?
No, 50 is not prime.
What are the factors of 50?
The factors of 50 are 1, 2, 5, 10, 25, 50.
What is 50 in Roman numerals?
50 in Roman numerals is L.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026