250

250 is a natural number that follows 249 and precedes 251. In decimal notation it is written as 250. It is even and composite, with prime factorization 2 × 5^3.

Its positive divisors are 1, 2, 5, 10, 25, 50, 125, and 250, giving eight divisors. The sum of the proper divisors is 218, so 250 is a deficient number. The Euler totient φ(250) equals 100, and the number of integers less than 250 and coprime to it is 100.

In numeral systems, 250 is 11111010 in binary and FA in hexadecimal. In Roman numerals it is written CCL. The number is not prime.

250 can be expressed as the sum of two squares: 250 = 15^2 + 5^2.

Area code 250 covers much of British Columbia, Canada. In Internet mail, the SMTP reply code 250 indicates that an action has been completed successfully. The year 250 can be used in historical contexts, such as 250 CE.