3131230312313 has 4 divisors (see below), whose sum is σ = 3149329909668. Its totient is φ = 3113130714960.

The previous prime is 3131230312283. The next prime is 3131230312337. The reversal of 3131230312313 is 3132130321313.

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 1108244663824 + 2022985648489 = 1052732^2 + 1422317^2 .

It is a cyclic number.

It is not a de Polignac number, because 3131230312313 - 2¹⁶ = 3131230246777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3131230312373) 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, 9049798418 + ... + 9049798763.

It is an arithmetic number, because the mean of its divisors is an integer number (787332477417).

Almost surely, 2^{3131230312313} is an apocalyptic number.

It is an amenable number.

3131230312313 is a deficient number, since it is larger than the sum of its proper divisors (18099597355).

3131230312313 is a wasteful number, since it uses less digits than its factorization.

3131230312313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18099597354.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 3131230312313 its reverse (3132130321313), we get a palindrome (6263360633626).

The spelling of 3131230312313 in words is "three trillion, one hundred thirty-one billion, two hundred thirty million, three hundred twelve thousand, three hundred thirteen".