31431480492 has 54 divisors (see below), whose sum is σ = 74651104164. Its totient is φ = 10293120480.

The previous prime is 31431480473. The next prime is 31431480503. The reversal of 31431480492 is 29408413413.

It is a self number, because there is not a number n which added to its sum of digits gives 31431480492.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 37462609 + ... + 37463447.

Almost surely, 2^31431480492 is an apocalyptic number.

It is an amenable number.

31431480492 is an abundant number, since it is smaller than the sum of its proper divisors (43219623672).

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

31431480492 is an frugal number, since it uses more digits than its factorization.

31431480492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1807 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 31431480492 in words is "thirty-one billion, four hundred thirty-one million, four hundred eighty thousand, four hundred ninety-two".