31213209108984 has 32 divisors (see below), whose sum is σ = 89180597454720. Its totient is φ = 8918059745376.

The previous prime is 31213209108979. The next prime is 31213209109031. The reversal of 31213209108984 is 48980190231213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92896455514 + ... + 92896455849.

It is an arithmetic number, because the mean of its divisors is an integer number (2786893670460).

Almost surely, 2^{31213209108984} is an apocalyptic number.

It is an amenable number.

31213209108984 is an abundant number, since it is smaller than the sum of its proper divisors (57967388345736).

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

31213209108984 is a wasteful number, since it uses less digits than its factorization.

31213209108984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185792911379 (or 185792911375 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The spelling of 31213209108984 in words is "thirty-one trillion, two hundred thirteen billion, two hundred nine million, one hundred eight thousand, nine hundred eighty-four".