256508022 has 32 divisors (see below), whose sum is σ = 524670048. Its totient is φ = 83572736.

The previous prime is 256508009. The next prime is 256508039. The reversal of 256508022 is 220805652.

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, 91798 + ... + 94550.

It is an arithmetic number, because the mean of its divisors is an integer number (16395939).

Almost surely, 2^256508022 is an apocalyptic number.

256508022 is an abundant number, since it is smaller than the sum of its proper divisors (268162026).

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

256508022 is a wasteful number, since it uses less digits than its factorization.

256508022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3104.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 256508022 is about 16015.8678191349. The cubic root of 256508022 is about 635.3801613073.

The spelling of 256508022 in words is "two hundred fifty-six million, five hundred eight thousand, twenty-two".