22243009 has 4 divisors (see below), whose sum is σ = 22254804. Its totient is φ = 22231216.

The previous prime is 22242989. The next prime is 22243019. The reversal of 22243009 is 90034222.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8105409 + 14137600 = 2847^2 + 3760^2 .

It is a cyclic number.

It is not a de Polignac number, because 22243009 - 2¹¹ = 22240961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22243019) 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, 2362 + ... + 7075.

It is an arithmetic number, because the mean of its divisors is an integer number (5563701).

Almost surely, 2^22243009 is an apocalyptic number.

It is an amenable number.

22243009 is a deficient number, since it is larger than the sum of its proper divisors (11795).

22243009 is an equidigital number, since it uses as much as digits as its factorization.

22243009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11794.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 22243009 is about 4716.2494632918. The cubic root of 22243009 is about 281.2318556854.

The spelling of 22243009 in words is "twenty-two million, two hundred forty-three thousand, nine".