31431442992 has 20 divisors (see below), whose sum is σ = 81197894520. Its totient is φ = 10477147648.

The previous prime is 31431442891. The next prime is 31431443047. The reversal of 31431442992 is 29924413413.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327410817 + ... + 327410912.

It is an arithmetic number, because the mean of its divisors is an integer number (4059894726).

Almost surely, 2^31431442992 is an apocalyptic number.

It is an amenable number.

31431442992 is an abundant number, since it is smaller than the sum of its proper divisors (49766451528).

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

31431442992 is a wasteful number, since it uses less digits than its factorization.

31431442992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654821740 (or 654821734 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The spelling of 31431442992 in words is "thirty-one billion, four hundred thirty-one million, four hundred forty-two thousand, nine hundred ninety-two".