31225825 has 6 divisors (see below), whose sum is σ = 38720054. Its totient is φ = 24980640.

The previous prime is 31225811. The next prime is 31225841. The reversal of 31225825 is 52852213.

It can be written as a sum of positive squares in 3 ways, for example, as 81 + 31225744 = 9^2 + 5588^2 .

It is not a de Polignac number, because 31225825 - 2⁵ = 31225793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31225793 and 31225802.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 624492 + ... + 624541.

Almost surely, 2^31225825 is an apocalyptic number.

It is an amenable number.

31225825 is a deficient number, since it is larger than the sum of its proper divisors (7494229).

31225825 is a wasteful number, since it uses less digits than its factorization.

31225825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249043 (or 1249038 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 31225825 is about 5588.0072476689. The cubic root of 31225825 is about 314.8990186097.

The spelling of 31225825 in words is "thirty-one million, two hundred twenty-five thousand, eight hundred twenty-five".