22224557 has 4 divisors (see below), whose sum is σ = 22588956. Its totient is φ = 21860160.

The previous prime is 22224539. The next prime is 22224563. The reversal of 22224557 is 75542222.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11062276 + 11162281 = 3326^2 + 3341^2 .

It is a cyclic number.

It is not a de Polignac number, because 22224557 - 2⁶ = 22224493 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22224577) 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, 182108 + ... + 182229.

It is an arithmetic number, because the mean of its divisors is an integer number (5647239).

Almost surely, 2^22224557 is an apocalyptic number.

It is an amenable number.

22224557 is a deficient number, since it is larger than the sum of its proper divisors (364399).

22224557 is an equidigital number, since it uses as much as digits as its factorization.

22224557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364398.

The product of its digits is 11200, while the sum is 29.

The square root of 22224557 is about 4714.2928419860. The cubic root of 22224557 is about 281.1540675617.

Adding to 22224557 its reverse (75542222), we get a palindrome (97766779).

The spelling of 22224557 in words is "twenty-two million, two hundred twenty-four thousand, five hundred fifty-seven".