31311020032013 has 8 divisors (see below), whose sum is σ = 32410470623232. Its totient is φ = 30224896114896.

The previous prime is 31311020032007. The next prime is 31311020032043. The reversal of 31311020032013 is 31023002011313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31311020032013 - 2⁴ = 31311020031997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311020032043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3331663745 + ... + 3331673142.

It is an arithmetic number, because the mean of its divisors is an integer number (4051308827904).

Almost surely, 2^{31311020032013} is an apocalyptic number.

It is an amenable number.

31311020032013 is a deficient number, since it is larger than the sum of its proper divisors (1099450591219).

31311020032013 is a wasteful number, since it uses less digits than its factorization.

31311020032013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6663337051.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31311020032013 its reverse (31023002011313), we get a palindrome (62334022043326).

The spelling of 31311020032013 in words is "thirty-one trillion, three hundred eleven billion, twenty million, thirty-two thousand, thirteen".