31525012 has 6 divisors (see below), whose sum is σ = 55168778. Its totient is φ = 15762504.

The previous prime is 31525007. The next prime is 31525027. The reversal of 31525012 is 21052513.

It can be written as a sum of positive squares in only one way, i.e., 29637136 + 1887876 = 5444^2 + 1374^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3940623 + ... + 3940630.

Almost surely, 2^31525012 is an apocalyptic number.

It is an amenable number.

31525012 is a deficient number, since it is larger than the sum of its proper divisors (23643766).

31525012 is a wasteful number, since it uses less digits than its factorization.

31525012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7881257 (or 7881255 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 31525012 is about 5614.7138840728. The cubic root of 31525012 is about 315.9015476022.

Adding to 31525012 its reverse (21052513), we get a palindrome (52577525).

The spelling of 31525012 in words is "thirty-one million, five hundred twenty-five thousand, twelve".