256515104 has 12 divisors (see below), whose sum is σ = 505014174. Its totient is φ = 128257536.

The previous prime is 256515097. The next prime is 256515151. The reversal of 256515104 is 401515652.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 206784400 + 49730704 = 14380^2 + 7052^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4008017 + ... + 4008080.

Almost surely, 2^256515104 is an apocalyptic number.

It is an amenable number.

256515104 is a deficient number, since it is larger than the sum of its proper divisors (248499070).

256515104 is an equidigital number, since it uses as much as digits as its factorization.

256515104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8016107 (or 8016099 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 256515104 is about 16016.0889108421. The cubic root of 256515104 is about 635.3860087150.

The spelling of 256515104 in words is "two hundred fifty-six million, five hundred fifteen thousand, one hundred four".