8204118217 has 2 divisors, whose sum is σ = 8204118218. Its totient is φ = 8204118216.

The previous prime is 8204118203. The next prime is 8204118227. The reversal of 8204118217 is 7128114028.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6149853241 + 2054264976 = 78421^2 + 45324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8204118217 is a prime.

It is a super-2 number, since 2×8204118217² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8204118227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4102059108 + 4102059109.

It is an arithmetic number, because the mean of its divisors is an integer number (4102059109).

Almost surely, 2^8204118217 is an apocalyptic number.

It is an amenable number.

8204118217 is a deficient number, since it is larger than the sum of its proper divisors (1).

8204118217 is an equidigital number, since it uses as much as digits as its factorization.

8204118217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 34.

The square root of 8204118217 is about 90576.5875764814. The cubic root of 8204118217 is about 2016.8672002971.

The spelling of 8204118217 in words is "eight billion, two hundred four million, one hundred eighteen thousand, two hundred seventeen".