22452009 has 4 divisors (see below), whose sum is σ = 29936016. Its totient is φ = 14968004.

The previous prime is 22451987. The next prime is 22452011. The reversal of 22452009 is 90025422.

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 22452009 - 2¹¹ = 22449961 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22452009.

It is not an unprimeable number, because it can be changed into a prime (22452049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3741999 + ... + 3742004.

It is an arithmetic number, because the mean of its divisors is an integer number (7484004).

Almost surely, 2^22452009 is an apocalyptic number.

It is an amenable number.

22452009 is a deficient number, since it is larger than the sum of its proper divisors (7484007).

22452009 is an equidigital number, since it uses as much as digits as its factorization.

22452009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7484006.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 22452009 is about 4738.3550943339. The cubic root of 22452009 is about 282.1099490785.

The spelling of 22452009 in words is "twenty-two million, four hundred fifty-two thousand, nine".