315565013 has 2 divisors, whose sum is σ = 315565014. Its totient is φ = 315565012.

The previous prime is 315565009. The next prime is 315565031. The reversal of 315565013 is 310565513.

Together with next prime (315565031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314069284 + 1495729 = 17722^2 + 1223^2 .

It is an emirp because it is prime and its reverse (310565513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315565013 - 2² = 315565009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315561013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157782506 + 157782507.

It is an arithmetic number, because the mean of its divisors is an integer number (157782507).

Almost surely, 2^315565013 is an apocalyptic number.

It is an amenable number.

315565013 is a deficient number, since it is larger than the sum of its proper divisors (1).

315565013 is an equidigital number, since it uses as much as digits as its factorization.

315565013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 29.

The square root of 315565013 is about 17764.1496559785. The cubic root of 315565013 is about 680.8157834715.

The spelling of 315565013 in words is "three hundred fifteen million, five hundred sixty-five thousand, thirteen".