22427209 has 8 divisors (see below), whose sum is σ = 26227520. Its totient is φ = 18776016.

The previous prime is 22427203. The next prime is 22427213. The reversal of 22427209 is 90272422.

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

It is not a de Polignac number, because 22427209 - 2⁵ = 22427177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22427203) 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, 36954 + ... + 37555.

It is an arithmetic number, because the mean of its divisors is an integer number (3278440).

Almost surely, 2^22427209 is an apocalyptic number.

It is an amenable number.

22427209 is a deficient number, since it is larger than the sum of its proper divisors (3800311).

22427209 is an equidigital number, since it uses as much as digits as its factorization.

22427209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74559.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 22427209 is about 4735.7374293768. The cubic root of 22427209 is about 282.0060399759.

The spelling of 22427209 in words is "twenty-two million, four hundred twenty-seven thousand, two hundred nine".