316125573821 has 2 divisors, whose sum is σ = 316125573822. Its totient is φ = 316125573820.

The previous prime is 316125573817. The next prime is 316125573871. The reversal of 316125573821 is 128375521613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196194957721 + 119930616100 = 442939^2 + 346310^2 .

It is an emirp because it is prime and its reverse (128375521613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 316125573821 - 2² = 316125573817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316125573871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158062786910 + 158062786911.

It is an arithmetic number, because the mean of its divisors is an integer number (158062786911).

Almost surely, 2^316125573821 is an apocalyptic number.

It is an amenable number.

316125573821 is a deficient number, since it is larger than the sum of its proper divisors (1).

316125573821 is an equidigital number, since it uses as much as digits as its factorization.

316125573821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 44.

The spelling of 316125573821 in words is "three hundred sixteen billion, one hundred twenty-five million, five hundred seventy-three thousand, eight hundred twenty-one".