317545561 has 2 divisors, whose sum is σ = 317545562. Its totient is φ = 317545560.

The previous prime is 317545541. The next prime is 317545573. The reversal of 317545561 is 165545713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 277855561 + 39690000 = 16669^2 + 6300^2 .

It is a cyclic number.

It is not a de Polignac number, because 317545561 - 2¹³ = 317537369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 317545561.

It is not a weakly prime, because it can be changed into another prime (317545541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158772780 + 158772781.

It is an arithmetic number, because the mean of its divisors is an integer number (158772781).

Almost surely, 2^317545561 is an apocalyptic number.

It is an amenable number.

317545561 is a deficient number, since it is larger than the sum of its proper divisors (1).

317545561 is an equidigital number, since it uses as much as digits as its factorization.

317545561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63000, while the sum is 37.

The square root of 317545561 is about 17819.8081078333. The cubic root of 317545561 is about 682.2371252565.

The spelling of 317545561 in words is "three hundred seventeen million, five hundred forty-five thousand, five hundred sixty-one".