16822217 has 2 divisors, whose sum is σ = 16822218. Its totient is φ = 16822216.

The previous prime is 16822207. The next prime is 16822229. The reversal of 16822217 is 71222861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13366336 + 3455881 = 3656^2 + 1859^2 .

It is a cyclic number.

It is not a de Polignac number, because 16822217 - 2¹² = 16818121 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16822217.

It is not a weakly prime, because it can be changed into another prime (16822207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8411108 + 8411109.

It is an arithmetic number, because the mean of its divisors is an integer number (8411109).

Almost surely, 2^16822217 is an apocalyptic number.

It is an amenable number.

16822217 is a deficient number, since it is larger than the sum of its proper divisors (1).

16822217 is an equidigital number, since it uses as much as digits as its factorization.

16822217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 29.

The square root of 16822217 is about 4101.4896074475. The cubic root of 16822217 is about 256.2286825812.

The spelling of 16822217 in words is "sixteen million, eight hundred twenty-two thousand, two hundred seventeen".