22330221 has 4 divisors (see below), whose sum is σ = 29773632. Its totient is φ = 14886812.

The previous prime is 22330213. The next prime is 22330223. The reversal of 22330221 is 12203322.

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 22330221 - 2³ = 22330213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22330221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22330223) 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, 3721701 + ... + 3721706.

It is an arithmetic number, because the mean of its divisors is an integer number (7443408).

Almost surely, 2^22330221 is an apocalyptic number.

It is an amenable number.

22330221 is a deficient number, since it is larger than the sum of its proper divisors (7443411).

22330221 is an equidigital number, since it uses as much as digits as its factorization.

22330221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7443410.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 22330221 is about 4725.4863241787. The cubic root of 22330221 is about 281.5989344197.

Adding to 22330221 its reverse (12203322), we get a palindrome (34533543).

The spelling of 22330221 in words is "twenty-two million, three hundred thirty thousand, two hundred twenty-one".