22333221 has 24 divisors (see below), whose sum is σ = 33096960. Its totient is φ = 14508000.

The previous prime is 22333217. The next prime is 22333231. The reversal of 22333221 is 12233322.

It is a happy number.

It is not a de Polignac number, because 22333221 - 2² = 22333217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22333194 and 22333203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22333231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71656 + ... + 71966.

It is an arithmetic number, because the mean of its divisors is an integer number (1379040).

Almost surely, 2^22333221 is an apocalyptic number.

It is an amenable number.

22333221 is a deficient number, since it is larger than the sum of its proper divisors (10763739).

22333221 is a wasteful number, since it uses less digits than its factorization.

22333221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 494 counting only the distinct ones).

The product of its digits is 432, while the sum is 18.

The square root of 22333221 is about 4725.8037411640. The cubic root of 22333221 is about 281.6115445199.

Adding to 22333221 its reverse (12233322), we get a palindrome (34566543).

The spelling of 22333221 in words is "twenty-two million, three hundred thirty-three thousand, two hundred twenty-one".