31200319980 has 72 divisors (see below), whose sum is σ = 100208096352. Its totient is φ = 7830667776.

The previous prime is 31200319949. The next prime is 31200319981. The reversal of 31200319980 is 8991300213.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (31200319981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5095032 + ... + 5101151.

It is an arithmetic number, because the mean of its divisors is an integer number (1391779116).

Almost surely, 2^31200319980 is an apocalyptic number.

31200319980 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31200319980 is an abundant number, since it is smaller than the sum of its proper divisors (69007776372).

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

31200319980 is a wasteful number, since it uses less digits than its factorization.

31200319980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10196215 (or 10196210 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The spelling of 31200319980 in words is "thirty-one billion, two hundred million, three hundred nineteen thousand, nine hundred eighty".