31318998404 has 24 divisors (see below), whose sum is σ = 54934987800. Its totient is φ = 15623331840.

The previous prime is 31318998371. The next prime is 31318998407. The reversal of 31318998404 is 40489981313.

It can be written as a sum of positive squares in 4 ways, for example, as 216148804 + 31102849600 = 14702^2 + 176360^2 .

It is a super-2 number, since 2×31318998404² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31318998407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3406694 + ... + 3415874.

It is an arithmetic number, because the mean of its divisors is an integer number (2288957825).

Almost surely, 2^31318998404 is an apocalyptic number.

It is an amenable number.

31318998404 is a deficient number, since it is larger than the sum of its proper divisors (23615989396).

31318998404 is a wasteful number, since it uses less digits than its factorization.

31318998404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11063 (or 11061 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 31318998404 in words is "thirty-one billion, three hundred eighteen million, nine hundred ninety-eight thousand, four hundred four".