172157230 has 16 divisors (see below), whose sum is σ = 354152160. Its totient is φ = 59025312.

The previous prime is 172157171. The next prime is 172157243. The reversal of 172157230 is 32751271.

It is a super-2 number, since 2×172157230² = 59276223682545800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1229625 + ... + 1229764.

It is an arithmetic number, because the mean of its divisors is an integer number (22134510).

Almost surely, 2^172157230 is an apocalyptic number.

172157230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172157230 is an abundant number, since it is smaller than the sum of its proper divisors (181994930).

172157230 is a wasteful number, since it uses less digits than its factorization.

172157230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459403.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 172157230 is about 13120.8700168853. The cubic root of 172157230 is about 556.2991829592.

The spelling of 172157230 in words is "one hundred seventy-two million, one hundred fifty-seven thousand, two hundred thirty".