315509297 has 2 divisors, whose sum is σ = 315509298. Its totient is φ = 315509296.

The previous prime is 315509287. The next prime is 315509339. The reversal of 315509297 is 792905513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192543376 + 122965921 = 13876^2 + 11089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315509297 is a prime.

It is a super-2 number, since 2×315509297² = 199092232986868418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315509237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157754648 + 157754649.

It is an arithmetic number, because the mean of its divisors is an integer number (157754649).

Almost surely, 2^315509297 is an apocalyptic number.

It is an amenable number.

315509297 is a deficient number, since it is larger than the sum of its proper divisors (1).

315509297 is an equidigital number, since it uses as much as digits as its factorization.

315509297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 85050, while the sum is 41.

The square root of 315509297 is about 17762.5813720867. The cubic root of 315509297 is about 680.7757129490.

The spelling of 315509297 in words is "three hundred fifteen million, five hundred nine thousand, two hundred ninety-seven".