22198217 has 2 divisors, whose sum is σ = 22198218. Its totient is φ = 22198216.

The previous prime is 22198207. The next prime is 22198259. The reversal of 22198217 is 71289122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20620681 + 1577536 = 4541^2 + 1256^2 .

It is a cyclic number.

It is not a de Polignac number, because 22198217 - 2¹⁰ = 22197193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22198207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11099108 + 11099109.

It is an arithmetic number, because the mean of its divisors is an integer number (11099109).

Almost surely, 2^22198217 is an apocalyptic number.

It is an amenable number.

22198217 is a deficient number, since it is larger than the sum of its proper divisors (1).

22198217 is an equidigital number, since it uses as much as digits as its factorization.

22198217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The square root of 22198217 is about 4711.4983816192. The cubic root of 22198217 is about 281.0429513504.

The spelling of 22198217 in words is "twenty-two million, one hundred ninety-eight thousand, two hundred seventeen".