31422625 has 32 divisors (see below), whose sum is σ = 43059744. Its totient is φ = 22752000.

The previous prime is 31422593. The next prime is 31422641. The reversal of 31422625 is 52622413.

It can be written as a sum of positive squares in 16 ways, for example, as 30206016 + 1216609 = 5496^2 + 1103^2 .

It is not a de Polignac number, because 31422625 - 2⁵ = 31422593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 31422625.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98967 + ... + 99283.

It is an arithmetic number, because the mean of its divisors is an integer number (1345617).

Almost surely, 2^31422625 is an apocalyptic number.

It is an amenable number.

31422625 is a deficient number, since it is larger than the sum of its proper divisors (11637119).

31422625 is a wasteful number, since it uses less digits than its factorization.

31422625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 396 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 31422625 is about 5605.5887291167. The cubic root of 31422625 is about 315.5591814525.

31422625 divided by its sum of digits (25) gives a triangular number (1256905 = T₁₅₈₅).

The spelling of 31422625 in words is "thirty-one million, four hundred twenty-two thousand, six hundred twenty-five".