31331004504 has 32 divisors (see below), whose sum is σ = 78725124720. Its totient is φ = 10390653056.

The previous prime is 31331004493. The next prime is 31331004517. The reversal of 31331004504 is 40540013313.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3308619 + ... + 3318074.

Almost surely, 2^31331004504 is an apocalyptic number.

It is an amenable number.

31331004504 is an abundant number, since it is smaller than the sum of its proper divisors (47394120216).

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

31331004504 is a wasteful number, since it uses less digits than its factorization.

31331004504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6626899 (or 6626895 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 31331004504 its reverse (40540013313), we get a palindrome (71871017817).

The spelling of 31331004504 in words is "thirty-one billion, three hundred thirty-one million, four thousand, five hundred four".