22190009 has 4 divisors (see below), whose sum is σ = 23154816. Its totient is φ = 21225204.

The previous prime is 22189997. The next prime is 22190023. The reversal of 22190009 is 90009122.

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 22190009 - 2²⁴ = 5412793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 964783 = 22190009 / (2 + 2 + 1 + 9 + 0 + 0 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22190039) 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, 482369 + ... + 482414.

It is an arithmetic number, because the mean of its divisors is an integer number (5788704).

Almost surely, 2^22190009 is an apocalyptic number.

It is an amenable number.

22190009 is a deficient number, since it is larger than the sum of its proper divisors (964807).

22190009 is an equidigital number, since it uses as much as digits as its factorization.

22190009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964806.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 22190009 is about 4710.6272406124. The cubic root of 22190009 is about 281.0083076532.

The spelling of 22190009 in words is "twenty-two million, one hundred ninety thousand, nine".