316411517221 has 2 divisors, whose sum is σ = 316411517222. Its totient is φ = 316411517220.

The previous prime is 316411517143. The next prime is 316411517249. The reversal of 316411517221 is 122715114613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 313332377121 + 3079140100 = 559761^2 + 55490^2 .

It is a cyclic number.

It is not a de Polignac number, because 316411517221 - 2¹⁵ = 316411484453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316411517021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158205758610 + 158205758611.

It is an arithmetic number, because the mean of its divisors is an integer number (158205758611).

Almost surely, 2^316411517221 is an apocalyptic number.

It is an amenable number.

316411517221 is a deficient number, since it is larger than the sum of its proper divisors (1).

316411517221 is an equidigital number, since it uses as much as digits as its factorization.

316411517221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 34.

The spelling of 316411517221 in words is "three hundred sixteen billion, four hundred eleven million, five hundred seventeen thousand, two hundred twenty-one".