31311301032013 has 4 divisors (see below), whose sum is σ = 31315115305180. Its totient is φ = 31307486758848.

The previous prime is 31311301032007. The next prime is 31311301032029. The reversal of 31311301032013 is 31023010311313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18024423088324 + 13286877943689 = 4245518^2 + 3645117^2 .

It is a cyclic number.

It is not a de Polignac number, because 31311301032013 - 2¹⁷ = 31311300900941 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 (31311301932013) 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, 1907124270 + ... + 1907140687.

It is an arithmetic number, because the mean of its divisors is an integer number (7828778826295).

Almost surely, 2^{31311301032013} is an apocalyptic number.

It is an amenable number.

31311301032013 is a deficient number, since it is larger than the sum of its proper divisors (3814273167).

31311301032013 is an equidigital number, since it uses as much as digits as its factorization.

31311301032013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3814273166.

The product of its (nonzero) digits is 486, while the sum is 22.

Adding to 31311301032013 its reverse (31023010311313), we get a palindrome (62334311343326).

The spelling of 31311301032013 in words is "thirty-one trillion, three hundred eleven billion, three hundred one million, thirty-two thousand, thirteen".