Number reference
250 explained.
250: two hundred fifty, composite; factors, prime factorization, roots, binary, hexadecimal, and digit properties.
Identity and representations
- Written form
- two hundred fifty
- Classification
- composite
- Factors
- 1, 2, 5, 10, 25, 50, 125, 250
- Prime factorization
- 2 × 5 × 5 × 5
- Square root
- 15.811388
- Cube root
- 6.299605
- Binary
- 11111010
- Octal
- 372
- Hexadecimal
- FA
- Roman numeral
- CCL
- Digit sum
- 7
- Digital root
- 7
What makes 250 notable
- Factor structure. 250 breaks down into 2 distinct primes (2, 5) and has 8 divisors in total, so it can be split into equal whole-number groups 6 ways beyond 1 and itself.
250 in everyday use
Two hundred fifty is a quarter of a thousand, and it is the size of a metric cup: recipes in Australia, Canada, and much of Europe treat 250 millilitres as one cup, and a 250-gram block is a standard pack of butter in many countries. In Chinese slang "250" (èr bǎi wǔ) is a mild insult meaning a fool, a usage with several folk explanations and no settled origin, so numbers such as prices and licence plates ending in 250 are sometimes avoided.
Arithmetically 250 is 2 × 5³, with eight divisors, and it is a sum of two squares in two ways: 15² + 5² = 225 + 25 and 13² + 9² = 169 + 81. It is also 5³ + 5³, twice a cube. It is 11111010 in binary and FA in hexadecimal. Its digit sum is 7, and it lies between the primes 241 and 251, the second of which is exactly one more than it.
Nearby numbers
How to read this page
The factor list shows every way 250 splits into equal whole-number groups — 8 divisors in total. The prime factorisation is the compact form of that same information, and the base conversions restate 250 for contexts that do not use decimal.
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