31132321312 has 48 divisors (see below), whose sum is σ = 61544568960. Its totient is φ = 15502088448.

The previous prime is 31132321279. The next prime is 31132321327. The reversal of 31132321312 is 21312323113.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10634793 + ... + 10637719.

It is an arithmetic number, because the mean of its divisors is an integer number (1282178520).

Almost surely, 2^31132321312 is an apocalyptic number.

31132321312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31132321312 is a deficient number, since it is larger than the sum of its proper divisors (30412247648).

31132321312 is a wasteful number, since it uses less digits than its factorization.

31132321312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4193 (or 4185 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

Adding to 31132321312 its reverse (21312323113), we get a palindrome (52444644425).

The spelling of 31132321312 in words is "thirty-one billion, one hundred thirty-two million, three hundred twenty-one thousand, three hundred twelve".