31281102958812 has 48 divisors (see below), whose sum is σ = 83426371564032. Its totient is φ = 8936376166080.

The previous prime is 31281102958799. The next prime is 31281102958829. The reversal of 31281102958812 is 21885920118213.

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 15 ways as a sum of consecutive naturals, for example, 21839739 + ... + 23227922.

It is an arithmetic number, because the mean of its divisors is an integer number (1738049407584).

Almost surely, 2^{31281102958812} is an apocalyptic number.

It is an amenable number.

31281102958812 is an abundant number, since it is smaller than the sum of its proper divisors (52145268605220).

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

31281102958812 is a wasteful number, since it uses less digits than its factorization.

31281102958812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45075938 (or 45075936 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 51.

The spelling of 31281102958812 in words is "thirty-one trillion, two hundred eighty-one billion, one hundred two million, nine hundred fifty-eight thousand, eight hundred twelve".