22556405 has 4 divisors (see below), whose sum is σ = 27067692. Its totient is φ = 18045120.

The previous prime is 22556383. The next prime is 22556411. The reversal of 22556405 is 50465522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3073009 + 19483396 = 1753^2 + 4414^2 .

It is not a de Polignac number, because 22556405 - 2⁶ = 22556341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2255636 + ... + 2255645.

It is an arithmetic number, because the mean of its divisors is an integer number (6766923).

Almost surely, 2^22556405 is an apocalyptic number.

It is an amenable number.

22556405 is a deficient number, since it is larger than the sum of its proper divisors (4511287).

22556405 is an equidigital number, since it uses as much as digits as its factorization.

22556405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4511286.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 22556405 is about 4749.3583777180. The cubic root of 22556405 is about 282.5465190838.

The spelling of 22556405 in words is "twenty-two million, five hundred fifty-six thousand, four hundred five".