8221474931317 has 2 divisors, whose sum is σ = 8221474931318. Its totient is φ = 8221474931316.

The previous prime is 8221474931311. The next prime is 8221474931381. The reversal of 8221474931317 is 7131394741228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6871140293796 + 1350334637521 = 2621286^2 + 1162039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8221474931317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8221474931311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4110737465658 + 4110737465659.

It is an arithmetic number, because the mean of its divisors is an integer number (4110737465659).

Almost surely, 2^{8221474931317} is an apocalyptic number.

It is an amenable number.

8221474931317 is a deficient number, since it is larger than the sum of its proper divisors (1).

8221474931317 is an equidigital number, since it uses as much as digits as its factorization.

8221474931317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 52.

The spelling of 8221474931317 in words is "eight trillion, two hundred twenty-one billion, four hundred seventy-four million, nine hundred thirty-one thousand, three hundred seventeen".