31299978724 has 27 divisors (see below), whose sum is σ = 63722856393. Its totient is φ = 13413215088.

The previous prime is 31299978713. The next prime is 31299978737. The reversal of 31299978724 is 42787999213.

The square root of 31299978724 is 176918.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3019502500 + 28280476224 = 54950^2 + 168168^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2470534 + ... + 2483170.

Almost surely, 2^31299978724 is an apocalyptic number.

31299978724 is the 176918-th square number.

It is an amenable number.

31299978724 is an abundant number, since it is smaller than the sum of its proper divisors (32422877669).

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

31299978724 is an frugal number, since it uses more digits than its factorization.

31299978724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25292 (or 12646 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 61.

The spelling of 31299978724 in words is "thirty-one billion, two hundred ninety-nine million, nine hundred seventy-eight thousand, seven hundred twenty-four".