22340221 has 4 divisors (see below), whose sum is σ = 22654944. Its totient is φ = 22025500.

The previous prime is 22340161. The next prime is 22340249. The reversal of 22340221 is 12204322.

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 22340221 - 2⁷ = 22340093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22340195 and 22340204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22340251) 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, 157255 + ... + 157396.

It is an arithmetic number, because the mean of its divisors is an integer number (5663736).

Almost surely, 2^22340221 is an apocalyptic number.

It is an amenable number.

22340221 is a deficient number, since it is larger than the sum of its proper divisors (314723).

22340221 is an equidigital number, since it uses as much as digits as its factorization.

22340221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314722.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 22340221 is about 4726.5442978988. The cubic root of 22340221 is about 281.6409636961.

Adding to 22340221 its reverse (12204322), we get a palindrome (34544543).

The spelling of 22340221 in words is "twenty-two million, three hundred forty thousand, two hundred twenty-one".