172625631 has 16 divisors (see below), whose sum is σ = 233775360. Its totient is φ = 113293440.

The previous prime is 172625623. The next prime is 172625671. The reversal of 172625631 is 136526271.

It is not a de Polignac number, because 172625631 - 2³ = 172625623 is a prime.

It is a super-2 number, since 2×172625631² = 59599216956296322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 172625592 and 172625601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172625671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53751 + ... + 56871.

It is an arithmetic number, because the mean of its divisors is an integer number (14610960).

Almost surely, 2^172625631 is an apocalyptic number.

172625631 is a deficient number, since it is larger than the sum of its proper divisors (61149729).

172625631 is a wasteful number, since it uses less digits than its factorization.

172625631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406.

The product of its digits is 15120, while the sum is 33.

The square root of 172625631 is about 13138.7073565096. The cubic root of 172625631 is about 556.8032476287.

The spelling of 172625631 in words is "one hundred seventy-two million, six hundred twenty-five thousand, six hundred thirty-one".