22224399 has 4 divisors (see below), whose sum is σ = 29632536. Its totient is φ = 14816264.

The previous prime is 22224361. The next prime is 22224401. The reversal of 22224399 is 99342222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22224399 - 2¹¹ = 22222351 is a prime.

It is a super-2 number, since 2×22224399² = 987847821822402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22224599) 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, 3704064 + ... + 3704069.

It is an arithmetic number, because the mean of its divisors is an integer number (7408134).

Almost surely, 2^22224399 is an apocalyptic number.

22224399 is a deficient number, since it is larger than the sum of its proper divisors (7408137).

22224399 is an equidigital number, since it uses as much as digits as its factorization.

22224399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7408136.

The product of its digits is 15552, while the sum is 33.

The square root of 22224399 is about 4714.2760844057. The cubic root of 22224399 is about 281.1534012949.

The spelling of 22224399 in words is "twenty-two million, two hundred twenty-four thousand, three hundred ninety-nine".