31431571716 has 12 divisors (see below), whose sum is σ = 73340334032. Its totient is φ = 10477190568.

The previous prime is 31431571697. The next prime is 31431571799. The reversal of 31431571716 is 61717513413.

It is a tau number, because it is divible by the number of its divisors (12).

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, 1309648810 + ... + 1309648833.

Almost surely, 2^31431571716 is an apocalyptic number.

It is an amenable number.

31431571716 is an abundant number, since it is smaller than the sum of its proper divisors (41908762316).

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

31431571716 is a wasteful number, since it uses less digits than its factorization.

31431571716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2619297650 (or 2619297648 counting only the distinct ones).

The product of its digits is 52920, while the sum is 39.

The spelling of 31431571716 in words is "thirty-one billion, four hundred thirty-one million, five hundred seventy-one thousand, seven hundred sixteen".