31630012 has 12 divisors (see below), whose sum is σ = 55757520. Its totient is φ = 15699296.

The previous prime is 31630007. The next prime is 31630019. The reversal of 31630012 is 21003613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31630019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28312 + ... + 29407.

It is an arithmetic number, because the mean of its divisors is an integer number (4646460).

Almost surely, 2^31630012 is an apocalyptic number.

It is an amenable number.

31630012 is a deficient number, since it is larger than the sum of its proper divisors (24127508).

31630012 is a wasteful number, since it uses less digits than its factorization.

31630012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57860 (or 57858 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 31630012 is about 5624.0565431013. The cubic root of 31630012 is about 316.2518821720.

Adding to 31630012 its reverse (21003613), we get a palindrome (52633625).

The spelling of 31630012 in words is "thirty-one million, six hundred thirty thousand, twelve".