31162125920 has 96 divisors (see below), whose sum is σ = 78271365312. Its totient is φ = 11697866752.

The previous prime is 31162125913. The next prime is 31162125937. The reversal of 31162125920 is 2952126113.

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 115154 + ... + 274926.

It is an arithmetic number, because the mean of its divisors is an integer number (815326722).

Almost surely, 2^31162125920 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 31162125920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39135682656).

31162125920 is an abundant number, since it is smaller than the sum of its proper divisors (47109239392).

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

31162125920 is a wasteful number, since it uses less digits than its factorization.

31162125920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159864 (or 159856 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 31162125920 in words is "thirty-one billion, one hundred sixty-two million, one hundred twenty-five thousand, nine hundred twenty".