315079561 has 2 divisors, whose sum is σ = 315079562. Its totient is φ = 315079560.

The previous prime is 315079549. The next prime is 315079573. The reversal of 315079561 is 165970513.

It is a balanced prime because it is at equal distance from previous prime (315079549) and next prime (315079573).

It can be written as a sum of positive squares in only one way, i.e., 175721536 + 139358025 = 13256^2 + 11805^2 .

It is a cyclic number.

It is not a de Polignac number, because 315079561 - 2¹⁹ = 314555273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 315079561.

It is not a weakly prime, because it can be changed into another prime (315074561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157539780 + 157539781.

It is an arithmetic number, because the mean of its divisors is an integer number (157539781).

Almost surely, 2^315079561 is an apocalyptic number.

It is an amenable number.

315079561 is a deficient number, since it is larger than the sum of its proper divisors (1).

315079561 is an equidigital number, since it uses as much as digits as its factorization.

315079561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28350, while the sum is 37.

The square root of 315079561 is about 17750.4805850433. The cubic root of 315079561 is about 680.4664914687.

The spelling of 315079561 in words is "three hundred fifteen million, seventy-nine thousand, five hundred sixty-one".