31811980030512 has 480 divisors, whose sum is σ = 100202721615360. Its totient is φ = 8648994816000.

The previous prime is 31811980030511. The next prime is 31811980030517. The reversal of 31811980030512 is 21503008911813.

It is not an unprimeable number, because it can be changed into a prime (31811980030511) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 256285648 + ... + 256409744.

It is an arithmetic number, because the mean of its divisors is an integer number (208755670032).

Almost surely, 2^{31811980030512} 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 31811980030512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50101360807680).

31811980030512 is an abundant number, since it is smaller than the sum of its proper divisors (68390741584848).

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

31811980030512 is a wasteful number, since it uses less digits than its factorization.

31811980030512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124273 (or 124256 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 42.

The spelling of 31811980030512 in words is "thirty-one trillion, eight hundred eleven billion, nine hundred eighty million, thirty thousand, five hundred twelve".