256327015 has 16 divisors (see below), whose sum is σ = 351800640. Its totient is φ = 175633920.

The previous prime is 256326997. The next prime is 256327069. The reversal of 256327015 is 510723652.

It is a de Polignac number, because none of the positive numbers 2^k-256327015 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73941 + ... + 77329.

It is an arithmetic number, because the mean of its divisors is an integer number (21987540).

Almost surely, 2^256327015 is an apocalyptic number.

256327015 is a deficient number, since it is larger than the sum of its proper divisors (95473625).

256327015 is a wasteful number, since it uses less digits than its factorization.

256327015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5562.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 256327015 is about 16010.2159573193. The cubic root of 256327015 is about 635.2306723898.

The spelling of 256327015 in words is "two hundred fifty-six million, three hundred twenty-seven thousand, fifteen".