22105609 has 2 divisors, whose sum is σ = 22105610. Its totient is φ = 22105608.

The previous prime is 22105597. The next prime is 22105619. The reversal of 22105609 is 90650122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14040009 + 8065600 = 3747^2 + 2840^2 .

It is a cyclic number.

It is not a de Polignac number, because 22105609 - 2¹¹ = 22103561 is a prime.

It is not a weakly prime, because it can be changed into another prime (22105619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11052804 + 11052805.

It is an arithmetic number, because the mean of its divisors is an integer number (11052805).

Almost surely, 2^22105609 is an apocalyptic number.

It is an amenable number.

22105609 is a deficient number, since it is larger than the sum of its proper divisors (1).

22105609 is an equidigital number, since it uses as much as digits as its factorization.

22105609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 22105609 is about 4701.6602386817. The cubic root of 22105609 is about 280.6515820310.

The spelling of 22105609 in words is "twenty-two million, one hundred five thousand, six hundred nine".