315446561 has 2 divisors, whose sum is σ = 315446562. Its totient is φ = 315446560.

The previous prime is 315446557. The next prime is 315446591. The reversal of 315446561 is 165644513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228584161 + 86862400 = 15119^2 + 9320^2 .

It is an emirp because it is prime and its reverse (165644513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315446561 - 2² = 315446557 is a prime.

It is not a weakly prime, because it can be changed into another prime (315446591) 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, 157723280 + 157723281.

It is an arithmetic number, because the mean of its divisors is an integer number (157723281).

Almost surely, 2^315446561 is an apocalyptic number.

It is an amenable number.

315446561 is a deficient number, since it is larger than the sum of its proper divisors (1).

315446561 is an equidigital number, since it uses as much as digits as its factorization.

315446561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 35.

The square root of 315446561 is about 17760.8153247535. The cubic root of 315446561 is about 680.7305880492.

The spelling of 315446561 in words is "three hundred fifteen million, four hundred forty-six thousand, five hundred sixty-one".