256232172 has 36 divisors (see below), whose sum is σ = 695488920. Its totient is φ = 73209024.

The previous prime is 256232111. The next prime is 256232237. The reversal of 256232172 is 271232652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217297 + ... + 218472.

Almost surely, 2^256232172 is an apocalyptic number.

It is an amenable number.

256232172 is an abundant number, since it is smaller than the sum of its proper divisors (439256748).

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

256232172 is a wasteful number, since it uses less digits than its factorization.

256232172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435790 (or 435781 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 256232172 is about 16007.2537307310. The cubic root of 256232172 is about 635.1523159528.

The spelling of 256232172 in words is "two hundred fifty-six million, two hundred thirty-two thousand, one hundred seventy-two".