31530925 has 12 divisors (see below), whose sum is σ = 39410176. Its totient is φ = 25023600.

The previous prime is 31530901. The next prime is 31530943. The reversal of 31530925 is 52903513.

It is not a de Polignac number, because 31530925 - 2⁵ = 31530893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31530893 and 31530902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1791 + ... + 8140.

Almost surely, 2^31530925 is an apocalyptic number.

It is an amenable number.

31530925 is a deficient number, since it is larger than the sum of its proper divisors (7879251).

31530925 is a wasteful number, since it uses less digits than its factorization.

31530925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10068 (or 10063 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 31530925 is about 5615.2404222794. The cubic root of 31530925 is about 315.9212970959.

The spelling of 31530925 in words is "thirty-one million, five hundred thirty thousand, nine hundred twenty-five".