22505609 has 8 divisors (see below), whose sum is σ = 26157120. Its totient is φ = 18963216.

The previous prime is 22505591. The next prime is 22505611. The reversal of 22505609 is 90650522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22505609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22505689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26834 + ... + 27659.

It is an arithmetic number, because the mean of its divisors is an integer number (3269640).

Almost surely, 2^22505609 is an apocalyptic number.

It is an amenable number.

22505609 is a deficient number, since it is larger than the sum of its proper divisors (3651511).

22505609 is an equidigital number, since it uses as much as digits as its factorization.

22505609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54559.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 22505609 is about 4744.0076939229. The cubic root of 22505609 is about 282.3342656978.

The spelling of 22505609 in words is "twenty-two million, five hundred five thousand, six hundred nine".