31313183435917 has 2 divisors, whose sum is σ = 31313183435918. Its totient is φ = 31313183435916.

The previous prime is 31313183435893. The next prime is 31313183435929. The reversal of 31313183435917 is 71953438131313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31190314959241 + 122868476676 = 5584829^2 + 350526^2 .

It is an emirp because it is prime and its reverse (71953438131313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31313183435917 - 2²³ = 31313175047309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31313183435117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656591717958 + 15656591717959.

It is an arithmetic number, because the mean of its divisors is an integer number (15656591717959).

Almost surely, 2^{31313183435917} is an apocalyptic number.

It is an amenable number.

31313183435917 is a deficient number, since it is larger than the sum of its proper divisors (1).

31313183435917 is an equidigital number, since it uses as much as digits as its factorization.

31313183435917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 52.

The spelling of 31313183435917 in words is "thirty-one trillion, three hundred thirteen billion, one hundred eighty-three million, four hundred thirty-five thousand, nine hundred seventeen".