255521256 has 16 divisors (see below), whose sum is σ = 638803200. Its totient is φ = 85173744.

The previous prime is 255521249. The next prime is 255521309. The reversal of 255521256 is 652125552.

It is a super-2 number, since 2×255521256² = 130582224535635072, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5323336 + ... + 5323383.

It is an arithmetic number, because the mean of its divisors is an integer number (39925200).

Almost surely, 2^255521256 is an apocalyptic number.

It is an amenable number.

255521256 is an abundant number, since it is smaller than the sum of its proper divisors (383281944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255521256 is a wasteful number, since it uses less digits than its factorization.

255521256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10646728 (or 10646724 counting only the distinct ones).

The product of its digits is 30000, while the sum is 33.

The square root of 255521256 is about 15985.0322489509. The cubic root of 255521256 is about 634.5643619574.

The spelling of 255521256 in words is "two hundred fifty-five million, five hundred twenty-one thousand, two hundred fifty-six".