316307170721 has 2 divisors, whose sum is σ = 316307170722. Its totient is φ = 316307170720.

The previous prime is 316307170667. The next prime is 316307170757. The reversal of 316307170721 is 127071703613.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 315996882496 + 310288225 = 562136^2 + 17615^2 .

It is an emirp because it is prime and its reverse (127071703613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 316307170721 - 2²⁶ = 316240061857 is a prime.

It is not a weakly prime, because it can be changed into another prime (316307130721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158153585360 + 158153585361.

It is an arithmetic number, because the mean of its divisors is an integer number (158153585361).

Almost surely, 2^316307170721 is an apocalyptic number.

It is an amenable number.

316307170721 is a deficient number, since it is larger than the sum of its proper divisors (1).

316307170721 is an equidigital number, since it uses as much as digits as its factorization.

316307170721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37044, while the sum is 38.

The spelling of 316307170721 in words is "three hundred sixteen billion, three hundred seven million, one hundred seventy thousand, seven hundred twenty-one".