22224921 has 4 divisors (see below), whose sum is σ = 29633232. Its totient is φ = 14816612.

The previous prime is 22224893. The next prime is 22224941. The reversal of 22224921 is 12942222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22224921 - 2⁷ = 22224793 is a prime.

It is a super-2 number, since 2×22224921² = 987894226912482, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22224891 and 22224900.

It is not an unprimeable number, because it can be changed into a prime (22224941) 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, 3704151 + ... + 3704156.

It is an arithmetic number, because the mean of its divisors is an integer number (7408308).

Almost surely, 2^22224921 is an apocalyptic number.

It is an amenable number.

22224921 is a deficient number, since it is larger than the sum of its proper divisors (7408311).

22224921 is an equidigital number, since it uses as much as digits as its factorization.

22224921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7408310.

The product of its digits is 1152, while the sum is 24.

The square root of 22224921 is about 4714.3314478301. The cubic root of 22224921 is about 281.1556024932.

The spelling of 22224921 in words is "twenty-two million, two hundred twenty-four thousand, nine hundred twenty-one".