256158315 has 32 divisors (see below), whose sum is σ = 520450560. Its totient is φ = 117100512.

The previous prime is 256158311. The next prime is 256158359. The reversal of 256158315 is 513851652.

256158315 = 4271² + 4272² + ... + 4284².

It is a happy number.

256158315 is a `hidden beast` number, since 2 + 5 + 61 + 583 + 15 = 666.

It is not a de Polignac number, because 256158315 - 2² = 256158311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256158315.

It is not an unprimeable number, because it can be changed into a prime (256158311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134589 + ... + 136478.

It is an arithmetic number, because the mean of its divisors is an integer number (16264080).

Almost surely, 2^256158315 is an apocalyptic number.

256158315 is an abundant number, since it is smaller than the sum of its proper divisors (264292245).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256158315 is a wasteful number, since it uses less digits than its factorization.

256158315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271088 (or 271082 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The square root of 256158315 is about 16004.9465791048. The cubic root of 256158315 is about 635.0912841261.

It can be divided in two parts, 25615 and 8315, that added together give a triangular number (33930 = T₂₆₀).

The spelling of 256158315 in words is "two hundred fifty-six million, one hundred fifty-eight thousand, three hundred fifteen".