22055609 has 2 divisors, whose sum is σ = 22055610.
Its totient is φ = 22055608.
The previous prime is 22055591. The next prime is 22055611. The reversal of 22055609 is 90655022.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 19114384 + 2941225 = 4372^2 + 1715^2
It is a cyclic number.
It is not a de Polignac number, because 22055609 - 224 = 5278393 is a prime.
It is a Sophie Germain prime.
Together with 22055611, it forms a pair of twin primes.
It is a Chen prime.
It is a Curzon number.
It is not a weakly prime, because it can be changed into another prime (22055629) 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, 11027804 + 11027805.
It is an arithmetic number, because the mean of its divisors is an integer number (11027805).
Almost surely, 222055609 is an apocalyptic number.
It is an amenable number.
22055609 is a deficient number, since it is larger than the sum of its proper divisors (1).
22055609 is an equidigital number, since it uses as much as digits as its factorization.
22055609 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 5400, while the sum is 29.
The square root of 22055609 is about 4696.3399578821.
The cubic root of 22055609 is about 280.4398232210.
The spelling of 22055609 in words is "twenty-two million, fifty-five thousand, six hundred nine".