31061016013 has 4 divisors (see below), whose sum is σ = 32888134620. Its totient is φ = 29233897408.

The previous prime is 31061015989. The next prime is 31061016017.

It is a happy number.

31061016013 is nontrivially palindromic in base 10.

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 27516837924 + 3544178089 = 165882^2 + 59533^2 .

It is not a de Polignac number, because 31061016013 - 2²⁵ = 31027461581 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 (31061016017) 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, 913559278 + ... + 913559311.

It is an arithmetic number, because the mean of its divisors is an integer number (8222033655).

Almost surely, 2^31061016013 is an apocalyptic number.

It is an amenable number.

31061016013 is a deficient number, since it is larger than the sum of its proper divisors (1827118607).

31061016013 is a wasteful number, since it uses less digits than its factorization.

31061016013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827118606.

The product of its (nonzero) digits is 324, while the sum is 22.

It can be divided in two parts, 310610 and 16013, that added together give a palindrome (326623).

The spelling of 31061016013 in words is "thirty-one billion, sixty-one million, sixteen thousand, thirteen".