31210000312 has 16 divisors (see below), whose sum is σ = 58597521840. Its totient is φ = 15583994496.

The previous prime is 31210000301. The next prime is 31210000331. The reversal of 31210000312 is 21300001213.

It is a junction number, because it is equal to n+sod(n) for n = 31210000292 and 31210000301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2619393 + ... + 2631280.

It is an arithmetic number, because the mean of its divisors is an integer number (3662345115).

Almost surely, 2^31210000312 is an apocalyptic number.

It is an amenable number.

31210000312 is a deficient number, since it is larger than the sum of its proper divisors (27387521528).

31210000312 is a wasteful number, since it uses less digits than its factorization.

31210000312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5251422 (or 5251418 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31210000312 its reverse (21300001213), we get a palindrome (52510001525).

Subtracting from 31210000312 its reverse (21300001213), we obtain a palindrome (9909999099).

The spelling of 31210000312 in words is "thirty-one billion, two hundred ten million, three hundred twelve", and thus it is an aban number.