22556409 has 4 divisors (see below), whose sum is σ = 30075216. Its totient is φ = 15037604.

The previous prime is 22556383. The next prime is 22556411. The reversal of 22556409 is 90465522.

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 22556409 - 2⁵ = 22556377 is a prime.

It is a super-3 number, since 3×22556409³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22556409.

It is not an unprimeable number, because it can be changed into a prime (22556419) 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, 3759399 + ... + 3759404.

It is an arithmetic number, because the mean of its divisors is an integer number (7518804).

Almost surely, 2^22556409 is an apocalyptic number.

It is an amenable number.

22556409 is a deficient number, since it is larger than the sum of its proper divisors (7518807).

22556409 is an equidigital number, since it uses as much as digits as its factorization.

22556409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7518806.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 22556409 is about 4749.3587988275. The cubic root of 22556409 is about 282.5465357854.

The spelling of 22556409 in words is "twenty-two million, five hundred fifty-six thousand, four hundred nine".