22232321 has 4 divisors (see below), whose sum is σ = 22609200. Its totient is φ = 21855444.

The previous prime is 22232317. The next prime is 22232323. The reversal of 22232321 is 12323222.

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 22232321 - 2² = 22232317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22232321.

It is not an unprimeable number, because it can be changed into a prime (22232323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188351 + ... + 188468.

It is an arithmetic number, because the mean of its divisors is an integer number (5652300).

Almost surely, 2^22232321 is an apocalyptic number.

It is an amenable number.

22232321 is a deficient number, since it is larger than the sum of its proper divisors (376879).

22232321 is an equidigital number, since it uses as much as digits as its factorization.

22232321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376878.

The product of its digits is 288, while the sum is 17.

The square root of 22232321 is about 4715.1162233820. The cubic root of 22232321 is about 281.1868035128.

Adding to 22232321 its reverse (12323222), we get a palindrome (34555543).

Subtracting from 22232321 its reverse (12323222), we obtain a palindrome (9909099).

The spelling of 22232321 in words is "twenty-two million, two hundred thirty-two thousand, three hundred twenty-one".