31211460564 has 48 divisors (see below), whose sum is σ = 73457664000. Its totient is φ = 10313817696.

The previous prime is 31211460547. The next prime is 31211460571. The reversal of 31211460564 is 46506411213.

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 15 ways as a sum of consecutive naturals, for example, 2124757 + ... + 2139395.

It is an arithmetic number, because the mean of its divisors is an integer number (1530368000).

Almost surely, 2^31211460564 is an apocalyptic number.

It is an amenable number.

31211460564 is an abundant number, since it is smaller than the sum of its proper divisors (42246203436).

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

31211460564 is a wasteful number, since it uses less digits than its factorization.

31211460564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16172 (or 16170 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 31211460564 its reverse (46506411213), we get a palindrome (77717871777).

The spelling of 31211460564 in words is "thirty-one billion, two hundred eleven million, four hundred sixty thousand, five hundred sixty-four".