172156230 has 24 divisors (see below), whose sum is σ = 447606432. Its totient is φ = 45908304.

The previous prime is 172156189. The next prime is 172156249. The reversal of 172156230 is 32651271.

It is a happy number.

172156230 is a `hidden beast` number, since 1 + 72 + 1 + 562 + 30 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 172156194 and 172156203.

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, 956334 + ... + 956513.

It is an arithmetic number, because the mean of its divisors is an integer number (18650268).

Almost surely, 2^172156230 is an apocalyptic number.

172156230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172156230 is an abundant number, since it is smaller than the sum of its proper divisors (275450202).

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

172156230 is a wasteful number, since it uses less digits than its factorization.

172156230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912860 (or 1912857 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 172156230 is about 13120.8319096009. The cubic root of 172156230 is about 556.2981058425.

The spelling of 172156230 in words is "one hundred seventy-two million, one hundred fifty-six thousand, two hundred thirty".