315345517 has 2 divisors, whose sum is σ = 315345518. Its totient is φ = 315345516.

The previous prime is 315345497. The next prime is 315345523. The reversal of 315345517 is 715543513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 313254601 + 2090916 = 17699^2 + 1446^2 .

It is a cyclic number.

It is not a de Polignac number, because 315345517 - 2²⁷ = 181127789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315345557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157672758 + 157672759.

It is an arithmetic number, because the mean of its divisors is an integer number (157672759).

Almost surely, 2^315345517 is an apocalyptic number.

It is an amenable number.

315345517 is a deficient number, since it is larger than the sum of its proper divisors (1).

315345517 is an equidigital number, since it uses as much as digits as its factorization.

315345517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31500, while the sum is 34.

The square root of 315345517 is about 17757.9705203044. The cubic root of 315345517 is about 680.6578962998.

The spelling of 315345517 in words is "three hundred fifteen million, three hundred forty-five thousand, five hundred seventeen".