256624475 has 6 divisors (see below), whose sum is σ = 318214380. Its totient is φ = 205299560.

The previous prime is 256624471. The next prime is 256624493. The reversal of 256624475 is 574426652.

It is not a de Polignac number, because 256624475 - 2² = 256624471 is a prime.

It is a super-2 number, since 2×256624475² = 131712242338051250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256624471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5132465 + ... + 5132514.

It is an arithmetic number, because the mean of its divisors is an integer number (53035730).

Almost surely, 2^256624475 is an apocalyptic number.

256624475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

256624475 is a deficient number, since it is larger than the sum of its proper divisors (61589905).

256624475 is a wasteful number, since it uses less digits than its factorization.

256624475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10264989 (or 10264984 counting only the distinct ones).

The product of its digits is 403200, while the sum is 41.

The square root of 256624475 is about 16019.5029573330. The cubic root of 256624475 is about 635.4762996021.

The spelling of 256624475 in words is "two hundred fifty-six million, six hundred twenty-four thousand, four hundred seventy-five".