3318220817 has 2 divisors, whose sum is σ = 3318220818. Its totient is φ = 3318220816.

The previous prime is 3318220813. The next prime is 3318220823. The reversal of 3318220817 is 7180228133.

It is a Cunningham number, because it is equal to 57604²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3318220816 + 1 = 57604^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 3318220817 - 2² = 3318220813 is a prime.

It is a super-2 number, since 2×3318220817² = 22021178780744294978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3318220813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1659110408 + 1659110409.

It is an arithmetic number, because the mean of its divisors is an integer number (1659110409).

Almost surely, 2^3318220817 is an apocalyptic number.

It is an amenable number.

3318220817 is a deficient number, since it is larger than the sum of its proper divisors (1).

3318220817 is an equidigital number, since it uses as much as digits as its factorization.

3318220817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 3318220817 is about 57604.0000086800. Note that the first 5 decimals coincide. The cubic root of 3318220817 is about 1491.5406518198.

The spelling of 3318220817 in words is "three billion, three hundred eighteen million, two hundred twenty thousand, eight hundred seventeen".