31331404120 has 64 divisors (see below), whose sum is σ = 71094996000. Its totient is φ = 12426316800.

The previous prime is 31331404109. The next prime is 31331404121. The reversal of 31331404120 is 2140413313.

It is a junction number, because it is equal to n+sod(n) for n = 31331404091 and 31331404100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31331404121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3577587 + ... + 3586333.

Almost surely, 2^31331404120 is an apocalyptic number.

It is an amenable number.

31331404120 is an abundant number, since it is smaller than the sum of its proper divisors (39763591880).

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

31331404120 is a wasteful number, since it uses less digits than its factorization.

31331404120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9508 (or 9504 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31331404120 its reverse (2140413313), we get a palindrome (33471817433).

The spelling of 31331404120 in words is "thirty-one billion, three hundred thirty-one million, four hundred four thousand, one hundred twenty".