31473275128 has 16 divisors (see below), whose sum is σ = 59477057280. Its totient is φ = 15612726528.

The previous prime is 31473275123. The next prime is 31473275129. The reversal of 31473275128 is 82157237413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31473275123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15487801 + ... + 15489832.

It is an arithmetic number, because the mean of its divisors is an integer number (3717316080).

Almost surely, 2^31473275128 is an apocalyptic number.

It is an amenable number.

31473275128 is a deficient number, since it is larger than the sum of its proper divisors (28003782152).

31473275128 is a wasteful number, since it uses less digits than its factorization.

31473275128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30977766 (or 30977762 counting only the distinct ones).

The product of its digits is 282240, while the sum is 43.

The spelling of 31473275128 in words is "thirty-one billion, four hundred seventy-three million, two hundred seventy-five thousand, one hundred twenty-eight".