315517 has 2 divisors, whose sum is σ = 315518. Its totient is φ = 315516.

The previous prime is 315493. The next prime is 315521. The reversal of 315517 is 715513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251001 + 64516 = 501^2 + 254^2 .

It is a cyclic number.

It is not a de Polignac number, because 315517 - 2⁷ = 315389 is a prime.

It is a Chen prime.

315517 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315527) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157758 + 157759.

It is an arithmetic number, because the mean of its divisors is an integer number (157759).

2³¹⁵⁵¹⁷ is an apocalyptic number.

It is an amenable number.

315517 is a deficient number, since it is larger than the sum of its proper divisors (1).

315517 is an equidigital number, since it uses as much as digits as its factorization.

315517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 525, while the sum is 22.

The square root of 315517 is about 561.7089993938. The cubic root of 315517 is about 68.0781253169.

It can be divided in two parts, 3155 and 17, that multiplied together give a palindrome (53635).

The spelling of 315517 in words is "three hundred fifteen thousand, five hundred seventeen".