31471912 has 16 divisors (see below), whose sum is σ = 61575840. Its totient is φ = 15051696.

The previous prime is 31471907. The next prime is 31471933. The reversal of 31471912 is 21917413.

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, 85338 + ... + 85705.

It is an arithmetic number, because the mean of its divisors is an integer number (3848490).

Almost surely, 2^31471912 is an apocalyptic number.

It is an amenable number.

31471912 is a deficient number, since it is larger than the sum of its proper divisors (30103928).

31471912 is a wasteful number, since it uses less digits than its factorization.

31471912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171072 (or 171068 counting only the distinct ones).

The product of its digits is 1512, while the sum is 28.

The square root of 31471912 is about 5609.9832441818. The cubic root of 31471912 is about 315.7240821755.

The spelling of 31471912 in words is "thirty-one million, four hundred seventy-one thousand, nine hundred twelve".