315565297 has 2 divisors, whose sum is σ = 315565298. Its totient is φ = 315565296.

The previous prime is 315565279. The next prime is 315565303. The reversal of 315565297 is 792565513.

Together with previous prime (315565279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250778896 + 64786401 = 15836^2 + 8049^2 .

It is an emirp because it is prime and its reverse (792565513) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315565297 is a prime.

It is not a weakly prime, because it can be changed into another prime (315565207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157782648 + 157782649.

It is an arithmetic number, because the mean of its divisors is an integer number (157782649).

Almost surely, 2^315565297 is an apocalyptic number.

It is an amenable number.

315565297 is a deficient number, since it is larger than the sum of its proper divisors (1).

315565297 is an equidigital number, since it uses as much as digits as its factorization.

315565297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 283500, while the sum is 43.

The square root of 315565297 is about 17764.1576496044. The cubic root of 315565297 is about 680.8159877100.

The spelling of 315565297 in words is "three hundred fifteen million, five hundred sixty-five thousand, two hundred ninety-seven".