22224421 has 4 divisors (see below), whose sum is σ = 22741312. Its totient is φ = 21707532.

The previous prime is 22224401. The next prime is 22224431. The reversal of 22224421 is 12442222.

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 22224421 - 2¹¹ = 22222373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22224401) 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, 258381 + ... + 258466.

It is an arithmetic number, because the mean of its divisors is an integer number (5685328).

Almost surely, 2^22224421 is an apocalyptic number.

It is an amenable number.

22224421 is a deficient number, since it is larger than the sum of its proper divisors (516891).

22224421 is an equidigital number, since it uses as much as digits as its factorization.

22224421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516890.

The product of its digits is 512, while the sum is 19.

The square root of 22224421 is about 4714.2784177433. The cubic root of 22224421 is about 281.1534940664.

Adding to 22224421 its reverse (12442222), we get a palindrome (34666643).

The spelling of 22224421 in words is "twenty-two million, two hundred twenty-four thousand, four hundred twenty-one".