31235486913 has 48 divisors (see below), whose sum is σ = 47047168896. Its totient is φ = 19952593920.

The previous prime is 31235486873. The next prime is 31235486923. The reversal of 31235486913 is 31968453213.

31235486913 is a `hidden beast` number, since 3 + 12 + 3 + 548 + 6 + 91 + 3 = 666.

It is not a de Polignac number, because 31235486913 - 2⁸ = 31235486657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31235486923) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6813220 + ... + 6817802.

It is an arithmetic number, because the mean of its divisors is an integer number (980149352).

Almost surely, 2^31235486913 is an apocalyptic number.

It is an amenable number.

31235486913 is a deficient number, since it is larger than the sum of its proper divisors (15811681983).

31235486913 is a wasteful number, since it uses less digits than its factorization.

31235486913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4934 (or 4931 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The spelling of 31235486913 in words is "thirty-one billion, two hundred thirty-five million, four hundred eighty-six thousand, nine hundred thirteen".