31311133404 has 12 divisors (see below), whose sum is σ = 73059311304. Its totient is φ = 10437044464.

The previous prime is 31311133387. The next prime is 31311133471. The reversal of 31311133404 is 40433111313.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1304630547 + ... + 1304630570.

It is an arithmetic number, because the mean of its divisors is an integer number (6088275942).

Almost surely, 2^31311133404 is an apocalyptic number.

It is an amenable number.

31311133404 is an abundant number, since it is smaller than the sum of its proper divisors (41748177900).

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

31311133404 is a wasteful number, since it uses less digits than its factorization.

31311133404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609261124 (or 2609261122 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31311133404 its reverse (40433111313), we get a palindrome (71744244717).

The spelling of 31311133404 in words is "thirty-one billion, three hundred eleven million, one hundred thirty-three thousand, four hundred four".