256315624 has 16 divisors (see below), whose sum is σ = 505886400. Its totient is φ = 121412592.

The previous prime is 256315607. The next prime is 256315627. The reversal of 256315624 is 426513652.

It is a self number, because there is not a number n which added to its sum of digits gives 256315624.

It is not an unprimeable number, because it can be changed into a prime (256315627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 842992 + ... + 843295.

It is an arithmetic number, because the mean of its divisors is an integer number (31617900).

Almost surely, 2^256315624 is an apocalyptic number.

It is an amenable number.

256315624 is a deficient number, since it is larger than the sum of its proper divisors (249570776).

256315624 is a wasteful number, since it uses less digits than its factorization.

256315624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686312 (or 1686308 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 256315624 is about 16009.8602117570. The cubic root of 256315624 is about 635.2212625093.

The spelling of 256315624 in words is "two hundred fifty-six million, three hundred fifteen thousand, six hundred twenty-four".