316584180221 has 2 divisors, whose sum is σ = 316584180222. Its totient is φ = 316584180220.

The previous prime is 316584180191. The next prime is 316584180247. The reversal of 316584180221 is 122081485613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 283455084025 + 33129096196 = 532405^2 + 182014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-316584180221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316584180251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158292090110 + 158292090111.

It is an arithmetic number, because the mean of its divisors is an integer number (158292090111).

Almost surely, 2^316584180221 is an apocalyptic number.

It is an amenable number.

316584180221 is a deficient number, since it is larger than the sum of its proper divisors (1).

316584180221 is an equidigital number, since it uses as much as digits as its factorization.

316584180221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 41.

The spelling of 316584180221 in words is "three hundred sixteen billion, five hundred eighty-four million, one hundred eighty thousand, two hundred twenty-one".