22508243 has 4 divisors (see below), whose sum is σ = 22517760. Its totient is φ = 22498728.

The previous prime is 22508209. The next prime is 22508251. The reversal of 22508243 is 34280522.

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 is a cyclic number.

It is not a de Polignac number, because 22508243 - 2¹⁸ = 22246099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22508203) 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, 1838 + ... + 6956.

It is an arithmetic number, because the mean of its divisors is an integer number (5629440).

Almost surely, 2^22508243 is an apocalyptic number.

22508243 is a deficient number, since it is larger than the sum of its proper divisors (9517).

22508243 is an equidigital number, since it uses as much as digits as its factorization.

22508243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9516.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 22508243 is about 4744.2852991784. The cubic root of 22508243 is about 282.3452798328.

Adding to 22508243 its reverse (34280522), we get a palindrome (56788765).

The spelling of 22508243 in words is "twenty-two million, five hundred eight thousand, two hundred forty-three".