31371188860 has 96 divisors (see below), whose sum is σ = 72781716672. Its totient is φ = 11263672320.

The previous prime is 31371188851. The next prime is 31371188861. The reversal of 31371188860 is 6888117313.

It is a self number, because there is not a number n which added to its sum of digits gives 31371188860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31371188861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5814324 + ... + 5819716.

It is an arithmetic number, because the mean of its divisors is an integer number (758142882).

Almost surely, 2^31371188860 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 31371188860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36390858336).

31371188860 is an abundant number, since it is smaller than the sum of its proper divisors (41410527812).

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

31371188860 is a wasteful number, since it uses less digits than its factorization.

31371188860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5743 (or 5741 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 31371188860 in words is "thirty-one billion, three hundred seventy-one million, one hundred eighty-eight thousand, eight hundred sixty".