316806470521 has 2 divisors, whose sum is σ = 316806470522. Its totient is φ = 316806470520.

The previous prime is 316806470503. The next prime is 316806470551. The reversal of 316806470521 is 125074608613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225614550121 + 91191920400 = 474989^2 + 301980^2 .

It is an emirp because it is prime and its reverse (125074608613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 316806470521 - 2⁵ = 316806470489 is a prime.

It is a super-2 number, since 2×316806470521² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (316806470551) 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, 158403235260 + 158403235261.

It is an arithmetic number, because the mean of its divisors is an integer number (158403235261).

Almost surely, 2^316806470521 is an apocalyptic number.

It is an amenable number.

316806470521 is a deficient number, since it is larger than the sum of its proper divisors (1).

316806470521 is an equidigital number, since it uses as much as digits as its factorization.

316806470521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 316806470521 in words is "three hundred sixteen billion, eight hundred six million, four hundred seventy thousand, five hundred twenty-one".