256120315 has 32 divisors (see below), whose sum is σ = 350438400. Its totient is φ = 177985920.

The previous prime is 256120309. The next prime is 256120349. The reversal of 256120315 is 513021652.

It is not a de Polignac number, because 256120315 - 2³ = 256120307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256120315.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163506 + ... + 165064.

It is an arithmetic number, because the mean of its divisors is an integer number (10951200).

Almost surely, 2^256120315 is an apocalyptic number.

256120315 is a deficient number, since it is larger than the sum of its proper divisors (94318085).

256120315 is a wasteful number, since it uses less digits than its factorization.

256120315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 256120315 is about 16003.7594020905. The cubic root of 256120315 is about 635.0598782066.

Adding to 256120315 its reverse (513021652), we get a palindrome (769141967).

The spelling of 256120315 in words is "two hundred fifty-six million, one hundred twenty thousand, three hundred fifteen".