31348684313 has 4 divisors (see below), whose sum is σ = 31659067428. Its totient is φ = 31038301200.

The previous prime is 31348684273. The next prime is 31348684321.

31348684313 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 29681432089 + 1667252224 = 172283^2 + 40832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31348684313 is a prime.

It is a super-2 number, since 2×31348684313² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31348684363) 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, 155191406 + ... + 155191607.

It is an arithmetic number, because the mean of its divisors is an integer number (7914766857).

Almost surely, 2^31348684313 is an apocalyptic number.

It is an amenable number.

31348684313 is a deficient number, since it is larger than the sum of its proper divisors (310383115).

31348684313 is a wasteful number, since it uses less digits than its factorization.

31348684313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310383114.

The product of its digits is 497664, while the sum is 44.

The spelling of 31348684313 in words is "thirty-one billion, three hundred forty-eight million, six hundred eighty-four thousand, three hundred thirteen".