31701011992 has 64 divisors (see below), whose sum is σ = 65253081600. Its totient is φ = 14348680320.

The previous prime is 31701011983. The next prime is 31701012019. The reversal of 31701011992 is 29911010713.

It is a super-2 number, since 2×31701011992² (a number of 22 digits) contains 22 as substring.

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, 2638623 + ... + 2650609.

It is an arithmetic number, because the mean of its divisors is an integer number (1019579400).

Almost surely, 2^31701011992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31701011992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32626540800).

31701011992 is an abundant number, since it is smaller than the sum of its proper divisors (33552069608).

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

31701011992 is a wasteful number, since it uses less digits than its factorization.

31701011992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12496 (or 12492 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 34.

The spelling of 31701011992 in words is "thirty-one billion, seven hundred one million, eleven thousand, nine hundred ninety-two".