31243390564 has 9 divisors (see below), whose sum is σ = 54676552147. Its totient is φ = 15621518524.

The previous prime is 31243390559. The next prime is 31243390573. The reversal of 31243390564 is 46509334213.

The square root of 31243390564 is 176758.

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

It is a super-2 number, since 2×31243390564² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 309327 + ... + 397705.

Almost surely, 2^31243390564 is an apocalyptic number.

31243390564 is the 176758-th square number.

It is an amenable number.

31243390564 is a deficient number, since it is larger than the sum of its proper divisors (23433161583).

31243390564 is an frugal number, since it uses more digits than its factorization.

31243390564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176762 (or 88381 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 40.

The spelling of 31243390564 in words is "thirty-one billion, two hundred forty-three million, three hundred ninety thousand, five hundred sixty-four".