315794561 has 2 divisors, whose sum is σ = 315794562. Its totient is φ = 315794560.

The previous prime is 315794539. The next prime is 315794599. The reversal of 315794561 is 165497513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311734336 + 4060225 = 17656^2 + 2015^2 .

It is a cyclic number.

It is not a de Polignac number, because 315794561 - 2¹⁰ = 315793537 is a prime.

It is not a weakly prime, because it can be changed into another prime (315796561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157897280 + 157897281.

It is an arithmetic number, because the mean of its divisors is an integer number (157897281).

Almost surely, 2^315794561 is an apocalyptic number.

It is an amenable number.

315794561 is a deficient number, since it is larger than the sum of its proper divisors (1).

315794561 is an equidigital number, since it uses as much as digits as its factorization.

315794561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 41.

The square root of 315794561 is about 17770.6094718217. The cubic root of 315794561 is about 680.9808229157.

The spelling of 315794561 in words is "three hundred fifteen million, seven hundred ninety-four thousand, five hundred sixty-one".