256715154 has 24 divisors (see below), whose sum is σ = 574159872. Its totient is φ = 82811160.

The previous prime is 256715153. The next prime is 256715171. The reversal of 256715154 is 451517652.

256715154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (256715153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 229474 + ... + 230589.

It is an arithmetic number, because the mean of its divisors is an integer number (23923328).

Almost surely, 2^256715154 is an apocalyptic number.

256715154 is an abundant number, since it is smaller than the sum of its proper divisors (317444718).

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

256715154 is a wasteful number, since it uses less digits than its factorization.

256715154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460102 (or 460099 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 256715154 is about 16022.3329761929. The cubic root of 256715154 is about 635.5511399169.

The spelling of 256715154 in words is "two hundred fifty-six million, seven hundred fifteen thousand, one hundred fifty-four".