255139250 has 16 divisors (see below), whose sum is σ = 477621144. Its totient is φ = 102055600.

The previous prime is 255139249. The next prime is 255139319. The reversal of 255139250 is 52931552.

It can be written as a sum of positive squares in 4 ways, for example, as 121066009 + 134073241 = 11003^2 + 11579^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510029 + ... + 510528.

Almost surely, 2^255139250 is an apocalyptic number.

255139250 is a deficient number, since it is larger than the sum of its proper divisors (222481894).

255139250 is a wasteful number, since it uses less digits than its factorization.

255139250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020574 (or 1020564 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 255139250 is about 15973.0789142231. The cubic root of 255139250 is about 634.2479782403.

The spelling of 255139250 in words is "two hundred fifty-five million, one hundred thirty-nine thousand, two hundred fifty".