31131133232 has 10 divisors (see below), whose sum is σ = 60316570668. Its totient is φ = 15565566608.

The previous prime is 31131133219. The next prime is 31131133283. The reversal of 31131133232 is 23233113113.

It is a junction number, because it is equal to n+sod(n) for n = 31131133198 and 31131133207.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972847898 + ... + 972847929.

Almost surely, 2^31131133232 is an apocalyptic number.

It is an amenable number.

31131133232 is a deficient number, since it is larger than the sum of its proper divisors (29185437436).

31131133232 is a wasteful number, since it uses less digits than its factorization.

31131133232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945695835 (or 1945695829 counting only the distinct ones).

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

Adding to 31131133232 its reverse (23233113113), we get a palindrome (54364246345).

The spelling of 31131133232 in words is "thirty-one billion, one hundred thirty-one million, one hundred thirty-three thousand, two hundred thirty-two".