321613217056897 has 2 divisors, whose sum is σ = 321613217056898. Its totient is φ = 321613217056896.

The previous prime is 321613217056889. The next prime is 321613217056921. The reversal of 321613217056897 is 798650712316123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210311223456321 + 111301993600576 = 14502111^2 + 10549976^2 .

It is a cyclic number.

It is not a de Polignac number, because 321613217056897 - 2³ = 321613217056889 is a prime.

It is a super-2 number, since 2×321613217056897² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (321613217057897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160806608528448 + 160806608528449.

It is an arithmetic number, because the mean of its divisors is an integer number (160806608528449).

Almost surely, 2^{321613217056897} is an apocalyptic number.

It is an amenable number.

321613217056897 is a deficient number, since it is larger than the sum of its proper divisors (1).

321613217056897 is an equidigital number, since it uses as much as digits as its factorization.

321613217056897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22861440, while the sum is 61.

The spelling of 321613217056897 in words is "three hundred twenty-one trillion, six hundred thirteen billion, two hundred seventeen million, fifty-six thousand, eight hundred ninety-seven".