22220009 has 4 divisors (see below), whose sum is σ = 25394304. Its totient is φ = 19045716.

The previous prime is 22219999. The next prime is 22220027. The reversal of 22220009 is 90002222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22220009 - 2⁴ = 22219993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22220509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1587137 + ... + 1587150.

It is an arithmetic number, because the mean of its divisors is an integer number (6348576).

Almost surely, 2^22220009 is an apocalyptic number.

It is an amenable number.

22220009 is a deficient number, since it is larger than the sum of its proper divisors (3174295).

22220009 is an equidigital number, since it uses as much as digits as its factorization.

22220009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3174294.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 22220009 is about 4713.8104543989. The cubic root of 22220009 is about 281.1348879378.

The spelling of 22220009 in words is "twenty-two million, two hundred twenty thousand, nine".