22106209 has 2 divisors, whose sum is σ = 22106210. Its totient is φ = 22106208.

The previous prime is 22106159. The next prime is 22106221. The reversal of 22106209 is 90260122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13897984 + 8208225 = 3728^2 + 2865^2 .

It is a cyclic number.

It is not a de Polignac number, because 22106209 - 2¹¹ = 22104161 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 22106209.

It is not a weakly prime, because it can be changed into another prime (22103209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11053104 + 11053105.

It is an arithmetic number, because the mean of its divisors is an integer number (11053105).

Almost surely, 2^22106209 is an apocalyptic number.

It is an amenable number.

22106209 is a deficient number, since it is larger than the sum of its proper divisors (1).

22106209 is an equidigital number, since it uses as much as digits as its factorization.

22106209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 22106209 is about 4701.7240454965. The cubic root of 22106209 is about 280.6541211969.

The spelling of 22106209 in words is "twenty-two million, one hundred six thousand, two hundred nine".