316521362225251 has 2 divisors, whose sum is σ = 316521362225252. Its totient is φ = 316521362225250.

The previous prime is 316521362225231. The next prime is 316521362225273. The reversal of 316521362225251 is 152522263125613.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 316521362225251 - 2⁴³ = 307725269203043 is a prime.

It is not a weakly prime, because it can be changed into another prime (316521362225221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158260681112625 + 158260681112626.

It is an arithmetic number, because the mean of its divisors is an integer number (158260681112626).

Almost surely, 2^{316521362225251} is an apocalyptic number.

316521362225251 is a deficient number, since it is larger than the sum of its proper divisors (1).

316521362225251 is an equidigital number, since it uses as much as digits as its factorization.

316521362225251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296000, while the sum is 46.

The spelling of 316521362225251 in words is "three hundred sixteen trillion, five hundred twenty-one billion, three hundred sixty-two million, two hundred twenty-five thousand, two hundred fifty-one".