315868513 has 2 divisors, whose sum is σ = 315868514. Its totient is φ = 315868512.

The previous prime is 315868481. The next prime is 315868537.

315868513 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238023184 + 77845329 = 15428^2 + 8823^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 315868513 - 2⁵ = 315868481 is a prime.

It is not a weakly prime, because it can be changed into another prime (315868013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157934256 + 157934257.

It is an arithmetic number, because the mean of its divisors is an integer number (157934257).

Almost surely, 2^315868513 is an apocalyptic number.

It is an amenable number.

315868513 is a deficient number, since it is larger than the sum of its proper divisors (1).

315868513 is an equidigital number, since it uses as much as digits as its factorization.

315868513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 40.

The square root of 315868513 is about 17772.6900890102. The cubic root of 315868513 is about 681.0339755762.

The spelling of 315868513 in words is "three hundred fifteen million, eight hundred sixty-eight thousand, five hundred thirteen".