31132314520 has 64 divisors (see below), whose sum is σ = 70482998880. Its totient is φ = 12375745536.

The previous prime is 31132314517. The next prime is 31132314527. The reversal of 31132314520 is 2541323113.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31132314527) 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, 5599582 + ... + 5605138.

Almost surely, 2^31132314520 is an apocalyptic number.

It is an amenable number.

31132314520 is an abundant number, since it is smaller than the sum of its proper divisors (39350684360).

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

31132314520 is a wasteful number, since it uses less digits than its factorization.

31132314520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6412 (or 6408 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 31132314520 its reverse (2541323113), we get a palindrome (33673637633).

The spelling of 31132314520 in words is "thirty-one billion, one hundred thirty-two million, three hundred fourteen thousand, five hundred twenty".