256551522 has 32 divisors (see below), whose sum is σ = 566911872. Its totient is φ = 76986624.

The previous prime is 256551497. The next prime is 256551527. The reversal of 256551522 is 225155652.

256551522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (256551527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52333 + ... + 57024.

It is an arithmetic number, because the mean of its divisors is an integer number (17715996).

Almost surely, 2^256551522 is an apocalyptic number.

256551522 is an abundant number, since it is smaller than the sum of its proper divisors (310360350).

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

256551522 is a wasteful number, since it uses less digits than its factorization.

256551522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109402.

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

The square root of 256551522 is about 16017.2257897552. The cubic root of 256551522 is about 635.4160763307.

The spelling of 256551522 in words is "two hundred fifty-six million, five hundred fifty-one thousand, five hundred twenty-two".