172312256 has 28 divisors (see below), whose sum is σ = 351178368. Its totient is φ = 83826432.

The previous prime is 172312247. The next prime is 172312267. The reversal of 172312256 is 652213271.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34016 + ... + 38751.

Almost surely, 2^172312256 is an apocalyptic number.

172312256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

172312256 is an abundant number, since it is smaller than the sum of its proper divisors (178866112).

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

172312256 is an equidigital number, since it uses as much as digits as its factorization.

172312256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72816 (or 72806 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

The square root of 172312256 is about 13126.7762988481. The cubic root of 172312256 is about 556.4661136262.

The spelling of 172312256 in words is "one hundred seventy-two million, three hundred twelve thousand, two hundred fifty-six".