22340321 has 2 divisors, whose sum is σ = 22340322. Its totient is φ = 22340320.

The previous prime is 22340309. The next prime is 22340359. The reversal of 22340321 is 12304322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20802721 + 1537600 = 4561^2 + 1240^2 .

It is a cyclic number.

It is not a de Polignac number, because 22340321 - 2²² = 18146017 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22340321.

It is not a weakly prime, because it can be changed into another prime (22340621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11170160 + 11170161.

It is an arithmetic number, because the mean of its divisors is an integer number (11170161).

Almost surely, 2^22340321 is an apocalyptic number.

It is an amenable number.

22340321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22340321 is an equidigital number, since it uses as much as digits as its factorization.

22340321 is an evil number, because the sum of its binary digits is even.

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

The square root of 22340321 is about 4726.5548764401. The cubic root of 22340321 is about 281.6413839255.

Adding to 22340321 its reverse (12304322), we get a palindrome (34644643).

The spelling of 22340321 in words is "twenty-two million, three hundred forty thousand, three hundred twenty-one".