31071539913 has 16 divisors (see below), whose sum is σ = 42750098496. Its totient is φ = 20058978240.

The previous prime is 31071539911. The next prime is 31071539957. The reversal of 31071539913 is 31993517013.

It is not a de Polignac number, because 31071539913 - 2¹ = 31071539911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31071539911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 639906 + ... + 686747.

It is an arithmetic number, because the mean of its divisors is an integer number (2671881156).

Almost surely, 2^31071539913 is an apocalyptic number.

It is an amenable number.

31071539913 is a deficient number, since it is larger than the sum of its proper divisors (11678558583).

31071539913 is a wasteful number, since it uses less digits than its factorization.

31071539913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326904.

The product of its (nonzero) digits is 76545, while the sum is 42.

The spelling of 31071539913 in words is "thirty-one billion, seventy-one million, five hundred thirty-nine thousand, nine hundred thirteen".