22343221 has 4 divisors (see below), whose sum is σ = 23519200. Its totient is φ = 21167244.

The previous prime is 22343213. The next prime is 22343231. The reversal of 22343221 is 12234322.

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 22343221 - 2³ = 22343213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 1175959 = 22343221 / (2 + 2 + 3 + 4 + 3 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22343201) 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, 587961 + ... + 587998.

It is an arithmetic number, because the mean of its divisors is an integer number (5879800).

Almost surely, 2^22343221 is an apocalyptic number.

It is an amenable number.

22343221 is a deficient number, since it is larger than the sum of its proper divisors (1175979).

22343221 is a wasteful number, since it uses less digits than its factorization.

22343221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175978.

The product of its digits is 576, while the sum is 19.

The square root of 22343221 is about 4726.8616438394. The cubic root of 22343221 is about 281.6535700332.

Adding to 22343221 its reverse (12234322), we get a palindrome (34577543).

The spelling of 22343221 in words is "twenty-two million, three hundred forty-three thousand, two hundred twenty-one".