31625 has 16 divisors (see below), whose sum is σ = 44928. Its totient is φ = 22000.

The previous prime is 31607. The next prime is 31627. The reversal of 31625 is 52613.

It is not a de Polignac number, because 31625 - 2¹² = 27529 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31625.

It is not an unprimeable number, because it can be changed into a prime (31627) 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, 1364 + ... + 1386.

It is an arithmetic number, because the mean of its divisors is an integer number (2808).

2³¹⁶²⁵ is an apocalyptic number.

It is an amenable number.

31625 is a deficient number, since it is larger than the sum of its proper divisors (13303).

31625 is a wasteful number, since it uses less digits than its factorization.

31625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49 (or 39 counting only the distinct ones).

The product of its digits is 180, while the sum is 17.

The square root of 31625 is about 177.8341924378. The cubic root of 31625 is about 31.6235177171.

It can be divided in two parts, 31 and 625, that added together give a palindrome (656).

The spelling of 31625 in words is "thirty-one thousand, six hundred twenty-five".