31313132312 has 32 divisors (see below), whose sum is σ = 73199531520. Its totient is φ = 12199921440.

The previous prime is 31313132299. The next prime is 31313132321. The reversal of 31313132312 is 21323131313.

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 7 ways as a sum of consecutive naturals, for example, 25415888 + ... + 25417119.

It is an arithmetic number, because the mean of its divisors is an integer number (2287485360).

Almost surely, 2^31313132312 is an apocalyptic number.

It is an amenable number.

31313132312 is an abundant number, since it is smaller than the sum of its proper divisors (41886399208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31313132312 is a wasteful number, since it uses less digits than its factorization.

31313132312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50833031 (or 50833027 counting only the distinct ones).

The product of its digits is 972, while the sum is 23.

Adding to 31313132312 its reverse (21323131313), we get a palindrome (52636263625).

Subtracting from 31313132312 its reverse (21323131313), we obtain a palindrome (9990000999).

The spelling of 31313132312 in words is "thirty-one billion, three hundred thirteen million, one hundred thirty-two thousand, three hundred twelve".