316868527421 has 2 divisors, whose sum is σ = 316868527422. Its totient is φ = 316868527420.

The previous prime is 316868527387. The next prime is 316868527457. The reversal of 316868527421 is 124725868613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263051023225 + 53817504196 = 512885^2 + 231986^2 .

It is a cyclic number.

It is not a de Polignac number, because 316868527421 - 2⁶ = 316868527357 is a prime.

It is a super-2 number, since 2×316868527421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316868526421) 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, 158434263710 + 158434263711.

It is an arithmetic number, because the mean of its divisors is an integer number (158434263711).

Almost surely, 2^316868527421 is an apocalyptic number.

It is an amenable number.

316868527421 is a deficient number, since it is larger than the sum of its proper divisors (1).

316868527421 is an equidigital number, since it uses as much as digits as its factorization.

316868527421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 53.

The spelling of 316868527421 in words is "three hundred sixteen billion, eight hundred sixty-eight million, five hundred twenty-seven thousand, four hundred twenty-one".