22181223 has 8 divisors (see below), whose sum is σ = 30860928. Its totient is φ = 14144504.

The previous prime is 22181219. The next prime is 22181233. The reversal of 22181223 is 32218122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 22181223 - 2² = 22181219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22181223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22181233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160665 + ... + 160802.

It is an arithmetic number, because the mean of its divisors is an integer number (3857616).

Almost surely, 2^22181223 is an apocalyptic number.

22181223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

22181223 is a deficient number, since it is larger than the sum of its proper divisors (8679705).

22181223 is a wasteful number, since it uses less digits than its factorization.

22181223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321493.

The product of its digits is 384, while the sum is 21.

The square root of 22181223 is about 4709.6945760845. The cubic root of 22181223 is about 280.9712149100.

Adding to 22181223 its reverse (32218122), we get a palindrome (54399345).

The spelling of 22181223 in words is "twenty-two million, one hundred eighty-one thousand, two hundred twenty-three".