31361563125 has 80 divisors (see below), whose sum is σ = 58179126720. Its totient is φ = 16691400000.

The previous prime is 31361563087. The next prime is 31361563159. The reversal of 31361563125 is 52136516313.

31361563125 is a `hidden beast` number, since 3 + 1 + 3 + 6 + 15 + 631 + 2 + 5 = 666.

It is not a de Polignac number, because 31361563125 - 2⁷ = 31361562997 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31361563125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9498975 + ... + 9502275.

It is an arithmetic number, because the mean of its divisors is an integer number (727239084).

Almost surely, 2^31361563125 is an apocalyptic number.

It is an amenable number.

31361563125 is a deficient number, since it is larger than the sum of its proper divisors (26817563595).

31361563125 is an equidigital number, since it uses as much as digits as its factorization.

31361563125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3893 (or 3872 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The spelling of 31361563125 in words is "thirty-one billion, three hundred sixty-one million, five hundred sixty-three thousand, one hundred twenty-five".