316537561 has 2 divisors, whose sum is σ = 316537562. Its totient is φ = 316537560.

The previous prime is 316537531. The next prime is 316537597. The reversal of 316537561 is 165735613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205635600 + 110901961 = 14340^2 + 10531^2 .

It is a cyclic number.

It is not a de Polignac number, because 316537561 - 2⁹ = 316537049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 316537561.

It is not a weakly prime, because it can be changed into another prime (316537531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158268780 + 158268781.

It is an arithmetic number, because the mean of its divisors is an integer number (158268781).

Almost surely, 2^316537561 is an apocalyptic number.

It is an amenable number.

316537561 is a deficient number, since it is larger than the sum of its proper divisors (1).

316537561 is an equidigital number, since it uses as much as digits as its factorization.

316537561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 37.

The square root of 316537561 is about 17791.5024941684. The cubic root of 316537561 is about 681.5144741330.

The spelling of 316537561 in words is "three hundred sixteen million, five hundred thirty-seven thousand, five hundred sixty-one".