12222224 has 80 divisors (see below), whose sum is σ = 28926720. Its totient is φ = 4892160.

The previous prime is 12222211. The next prime is 12222241. The reversal of 12222224 is 42222221.

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 10.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 172109 + ... + 172179.

It is an arithmetic number, because the mean of its divisors is an integer number (361584).

Almost surely, 2^12222224 is an apocalyptic number.

12222224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12222224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14463360).

12222224 is an abundant number, since it is smaller than the sum of its proper divisors (16704496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12222224 is a wasteful number, since it uses less digits than its factorization.

12222224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 162 counting only the distinct ones).

The product of its digits is 256, while the sum is 17.

The square root of 12222224 is about 3496.0297481572. The cubic root of 12222224 is about 230.3474521687.

Adding to 12222224 its reverse (42222221), we get a palindrome (54444445).

The spelling of 12222224 in words is "twelve million, two hundred twenty-two thousand, two hundred twenty-four".