31499031960 has 96 divisors (see below), whose sum is σ = 111678400080. Its totient is φ = 7636128000.

The previous prime is 31499031931. The next prime is 31499031973. The reversal of 31499031960 is 6913099413.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3973191 + ... + 3981110.

Almost surely, 2^31499031960 is an apocalyptic number.

31499031960 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31499031960 is an abundant number, since it is smaller than the sum of its proper divisors (80179368120).

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

31499031960 is a wasteful number, since it uses less digits than its factorization.

31499031960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7954329 (or 7954322 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The spelling of 31499031960 in words is "thirty-one billion, four hundred ninety-nine million, thirty-one thousand, nine hundred sixty".