315230917 has 2 divisors, whose sum is σ = 315230918. Its totient is φ = 315230916.

The previous prime is 315230897. The next prime is 315230921. The reversal of 315230917 is 719032513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232074756 + 83156161 = 15234^2 + 9119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315230917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315230947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157615458 + 157615459.

It is an arithmetic number, because the mean of its divisors is an integer number (157615459).

Almost surely, 2^315230917 is an apocalyptic number.

It is an amenable number.

315230917 is a deficient number, since it is larger than the sum of its proper divisors (1).

315230917 is an equidigital number, since it uses as much as digits as its factorization.

315230917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 315230917 is about 17754.7435070181. The cubic root of 315230917 is about 680.5754334754.

The spelling of 315230917 in words is "three hundred fifteen million, two hundred thirty thousand, nine hundred seventeen".