17220880217 has 2 divisors, whose sum is σ = 17220880218. Its totient is φ = 17220880216.

The previous prime is 17220880213. The next prime is 17220880247. The reversal of 17220880217 is 71208802271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15811553536 + 1409326681 = 125744^2 + 37541^2 .

It is a cyclic number.

It is not a de Polignac number, because 17220880217 - 2² = 17220880213 is a prime.

It is not a weakly prime, because it can be changed into another prime (17220880211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8610440108 + 8610440109.

It is an arithmetic number, because the mean of its divisors is an integer number (8610440109).

Almost surely, 2^17220880217 is an apocalyptic number.

It is an amenable number.

17220880217 is a deficient number, since it is larger than the sum of its proper divisors (1).

17220880217 is an equidigital number, since it uses as much as digits as its factorization.

17220880217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 38.

The spelling of 17220880217 in words is "seventeen billion, two hundred twenty million, eight hundred eighty thousand, two hundred seventeen".