31471973911 has 32 divisors (see below), whose sum is σ = 38325450240. Its totient is φ = 25228578816.

The previous prime is 31471973887. The next prime is 31471973917. The reversal of 31471973911 is 11937917413.

It is not a de Polignac number, because 31471973911 - 2⁷ = 31471973783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31471973917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13844871 + ... + 13847143.

It is an arithmetic number, because the mean of its divisors is an integer number (1197670320).

Almost surely, 2^31471973911 is an apocalyptic number.

31471973911 is a deficient number, since it is larger than the sum of its proper divisors (6853476329).

31471973911 is a wasteful number, since it uses less digits than its factorization.

31471973911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2983.

The product of its digits is 142884, while the sum is 46.

The spelling of 31471973911 in words is "thirty-one billion, four hundred seventy-one million, nine hundred seventy-three thousand, nine hundred eleven".