316337515421 has 2 divisors, whose sum is σ = 316337515422. Its totient is φ = 316337515420.

The previous prime is 316337515379. The next prime is 316337515433. The reversal of 316337515421 is 124515733613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239130780100 + 77206735321 = 489010^2 + 277861^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-316337515421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316337515121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158168757710 + 158168757711.

It is an arithmetic number, because the mean of its divisors is an integer number (158168757711).

Almost surely, 2^316337515421 is an apocalyptic number.

It is an amenable number.

316337515421 is a deficient number, since it is larger than the sum of its proper divisors (1).

316337515421 is an equidigital number, since it uses as much as digits as its factorization.

316337515421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 41.

The spelling of 316337515421 in words is "three hundred sixteen billion, three hundred thirty-seven million, five hundred fifteen thousand, four hundred twenty-one".