22256566 has 8 divisors (see below), whose sum is σ = 33406920. Its totient is φ = 11120928.

The previous prime is 22256551. The next prime is 22256569. The reversal of 22256566 is 66565222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×22256566² = 990709460224712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22256569) 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, 1645 + ... + 6871.

It is an arithmetic number, because the mean of its divisors is an integer number (4175865).

Almost surely, 2^22256566 is an apocalyptic number.

22256566 is a deficient number, since it is larger than the sum of its proper divisors (11150354).

22256566 is a wasteful number, since it uses less digits than its factorization.

22256566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7358.

The product of its digits is 43200, while the sum is 34.

The square root of 22256566 is about 4717.6865092967. The cubic root of 22256566 is about 281.2889805395.

It can be divided in two parts, 22256 and 566, that added together give a palindrome (22822).

The spelling of 22256566 in words is "twenty-two million, two hundred fifty-six thousand, five hundred sixty-six".