31331433212 has 12 divisors (see below), whose sum is σ = 55105537200. Its totient is φ = 15586994016.

The previous prime is 31331433209. The next prime is 31331433223. The reversal of 31331433212 is 21233413313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19679753 + ... + 19681344.

It is an arithmetic number, because the mean of its divisors is an integer number (4592128100).

Almost surely, 2^31331433212 is an apocalyptic number.

It is an amenable number.

31331433212 is a deficient number, since it is larger than the sum of its proper divisors (23774103988).

31331433212 is a wasteful number, since it uses less digits than its factorization.

31331433212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39361300 (or 39361298 counting only the distinct ones).

The product of its digits is 3888, while the sum is 26.

Adding to 31331433212 its reverse (21233413313), we get a palindrome (52564846525).

The spelling of 31331433212 in words is "thirty-one billion, three hundred thirty-one million, four hundred thirty-three thousand, two hundred twelve".