22225224 has 48 divisors (see below), whose sum is σ = 64638000. Its totient is φ = 6349728.

The previous prime is 22225211. The next prime is 22225277. The reversal of 22225224 is 42252222.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 22225224.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8274 + ... + 10625.

It is an arithmetic number, because the mean of its divisors is an integer number (1346625).

Almost surely, 2^22225224 is an apocalyptic number.

22225224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22225224 is an abundant number, since it is smaller than the sum of its proper divisors (42412776).

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

22225224 is a wasteful number, since it uses less digits than its factorization.

22225224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18922 (or 18911 counting only the distinct ones).

The product of its digits is 1280, while the sum is 21.

The square root of 22225224 is about 4714.3635837725. The cubic root of 22225224 is about 281.1568801845.

Adding to 22225224 its reverse (42252222), we get a palindrome (64477446).

The spelling of 22225224 in words is "twenty-two million, two hundred twenty-five thousand, two hundred twenty-four".