31213023332 has 48 divisors (see below), whose sum is σ = 59435108208. Its totient is φ = 14284615680.

The previous prime is 31213023329. The next prime is 31213023343. The reversal of 31213023332 is 23332031213.

It can be written as a sum of positive squares in 8 ways, for example, as 4785318976 + 26427704356 = 69176^2 + 162566^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31213023298 and 31213023307.

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, 866138 + ... + 901454.

It is an arithmetic number, because the mean of its divisors is an integer number (1238231421).

Almost surely, 2^31213023332 is an apocalyptic number.

It is an amenable number.

31213023332 is a deficient number, since it is larger than the sum of its proper divisors (28222084876).

31213023332 is a wasteful number, since it uses less digits than its factorization.

31213023332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35696 (or 35694 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 31213023332 its reverse (23332031213), we get a palindrome (54545054545).

The spelling of 31213023332 in words is "thirty-one billion, two hundred thirteen million, twenty-three thousand, three hundred thirty-two".