31371311712 has 96 divisors (see below), whose sum is σ = 88725121632. Its totient is φ = 9648267264.

The previous prime is 31371311687. The next prime is 31371311723. The reversal of 31371311712 is 21711317313.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 31371311712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3611118 + ... + 3619794.

It is an arithmetic number, because the mean of its divisors is an integer number (924220017).

Almost surely, 2^31371311712 is an apocalyptic number.

31371311712 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31371311712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44362560816).

31371311712 is an abundant number, since it is smaller than the sum of its proper divisors (57353809920).

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

31371311712 is a wasteful number, since it uses less digits than its factorization.

31371311712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11600 (or 11592 counting only the distinct ones).

The product of its digits is 2646, while the sum is 30.

The spelling of 31371311712 in words is "thirty-one billion, three hundred seventy-one million, three hundred eleven thousand, seven hundred twelve".