22330421 has 4 divisors (see below), whose sum is σ = 22340172. Its totient is φ = 22320672.

The previous prime is 22330417. The next prime is 22330457. The reversal of 22330421 is 12403322.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 19140625 + 3189796 = 4375^2 + 1786^2 .

It is a cyclic number.

It is not a de Polignac number, because 22330421 - 2² = 22330417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22330421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22330621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641 + ... + 6713.

It is an arithmetic number, because the mean of its divisors is an integer number (5585043).

Almost surely, 2^22330421 is an apocalyptic number.

It is an amenable number.

22330421 is a deficient number, since it is larger than the sum of its proper divisors (9751).

22330421 is an equidigital number, since it uses as much as digits as its factorization.

22330421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9750.

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

The square root of 22330421 is about 4725.5074859744. The cubic root of 22330421 is about 281.5997751281.

Adding to 22330421 its reverse (12403322), we get a palindrome (34733743).

The spelling of 22330421 in words is "twenty-two million, three hundred thirty thousand, four hundred twenty-one".