331216715317 has 2 divisors, whose sum is σ = 331216715318. Its totient is φ = 331216715316.

The previous prime is 331216715309. The next prime is 331216715321. The reversal of 331216715317 is 713517612133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299385159921 + 31831555396 = 547161^2 + 178414^2 .

It is a cyclic number.

It is not a de Polignac number, because 331216715317 - 2³ = 331216715309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 331216715317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331216715327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165608357658 + 165608357659.

It is an arithmetic number, because the mean of its divisors is an integer number (165608357659).

Almost surely, 2^331216715317 is an apocalyptic number.

It is an amenable number.

331216715317 is a deficient number, since it is larger than the sum of its proper divisors (1).

331216715317 is an equidigital number, since it uses as much as digits as its factorization.

331216715317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 40.

The spelling of 331216715317 in words is "three hundred thirty-one billion, two hundred sixteen million, seven hundred fifteen thousand, three hundred seventeen".