31133012232 has 64 divisors (see below), whose sum is σ = 89194014720. Its totient is φ = 8870891328.

The previous prime is 31133012219. The next prime is 31133012243. The reversal of 31133012232 is 23221033113.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 31133012199 and 31133012208.

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, 190818 + ... + 314129.

It is an arithmetic number, because the mean of its divisors is an integer number (1393656480).

Almost surely, 2^31133012232 is an apocalyptic number.

It is an amenable number.

31133012232 is an abundant number, since it is smaller than the sum of its proper divisors (58061002488).

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

31133012232 is a wasteful number, since it uses less digits than its factorization.

31133012232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505330 (or 505326 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31133012232 its reverse (23221033113), we get a palindrome (54354045345).

The spelling of 31133012232 in words is "thirty-one billion, one hundred thirty-three million, twelve thousand, two hundred thirty-two".