22556207 has 4 divisors (see below), whose sum is σ = 22585656. Its totient is φ = 22526760.

The previous prime is 22556179. The next prime is 22556221. The reversal of 22556207 is 70265522.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22556207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22556207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22556257) 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, 13544 + ... + 15117.

It is an arithmetic number, because the mean of its divisors is an integer number (5646414).

Almost surely, 2^22556207 is an apocalyptic number.

22556207 is a deficient number, since it is larger than the sum of its proper divisors (29449).

22556207 is an equidigital number, since it uses as much as digits as its factorization.

22556207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29448.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 22556207 is about 4749.3375327513. The cubic root of 22556207 is about 282.5456923508.

The spelling of 22556207 in words is "twenty-two million, five hundred fifty-six thousand, two hundred seven".