31331213132 has 48 divisors (see below), whose sum is σ = 57318202368. Its totient is φ = 14974391040.

The previous prime is 31331213113. The next prime is 31331213141. The reversal of 31331213132 is 23131213313.

It is a junction number, because it is equal to n+sod(n) for n = 31331213098 and 31331213107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1417268 + ... + 1439204.

It is an arithmetic number, because the mean of its divisors is an integer number (1194129216).

Almost surely, 2^31331213132 is an apocalyptic number.

It is an amenable number.

31331213132 is a deficient number, since it is larger than the sum of its proper divisors (25986989236).

31331213132 is a wasteful number, since it uses less digits than its factorization.

31331213132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22166 (or 22164 counting only the distinct ones).

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

Adding to 31331213132 its reverse (23131213313), we get a palindrome (54462426445).

The spelling of 31331213132 in words is "thirty-one billion, three hundred thirty-one million, two hundred thirteen thousand, one hundred thirty-two".