316127526821 has 2 divisors, whose sum is σ = 316127526822. Its totient is φ = 316127526820.

The previous prime is 316127526797. The next prime is 316127526877. The reversal of 316127526821 is 128625721613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170061388225 + 146066138596 = 412385^2 + 382186^2 .

It is a cyclic number.

It is not a de Polignac number, because 316127526821 - 2³⁸ = 41249619877 is a prime.

It is a super-2 number, since 2×316127526821² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316127526521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158063763410 + 158063763411.

It is an arithmetic number, because the mean of its divisors is an integer number (158063763411).

Almost surely, 2^316127526821 is an apocalyptic number.

It is an amenable number.

316127526821 is a deficient number, since it is larger than the sum of its proper divisors (1).

316127526821 is an equidigital number, since it uses as much as digits as its factorization.

316127526821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The spelling of 316127526821 in words is "three hundred sixteen billion, one hundred twenty-seven million, five hundred twenty-six thousand, eight hundred twenty-one".