315244513 has 2 divisors, whose sum is σ = 315244514. Its totient is φ = 315244512.

The previous prime is 315244507. The next prime is 315244537. The reversal of 315244513 is 315442513.

It is the 7249-th star number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314991504 + 253009 = 17748^2 + 503^2 .

It is a cyclic number.

It is not a de Polignac number, because 315244513 - 2⁹ = 315244001 is a prime.

It is not a weakly prime, because it can be changed into another prime (315244543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157622256 + 157622257.

It is an arithmetic number, because the mean of its divisors is an integer number (157622257).

Almost surely, 2^315244513 is an apocalyptic number.

It is an amenable number.

315244513 is a deficient number, since it is larger than the sum of its proper divisors (1).

315244513 is an equidigital number, since it uses as much as digits as its factorization.

315244513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 28.

The square root of 315244513 is about 17755.1263864834. The cubic root of 315244513 is about 680.5852178061.

The spelling of 315244513 in words is "three hundred fifteen million, two hundred forty-four thousand, five hundred thirteen".