22142243 has 4 divisors (see below), whose sum is σ = 22740720. Its totient is φ = 21543768.

The previous prime is 22142231. The next prime is 22142257. The reversal of 22142243 is 34224122.

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

It is not a de Polignac number, because 22142243 - 2¹² = 22138147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22142213) 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, 299183 + ... + 299256.

It is an arithmetic number, because the mean of its divisors is an integer number (5685180).

Almost surely, 2^22142243 is an apocalyptic number.

22142243 is a deficient number, since it is larger than the sum of its proper divisors (598477).

22142243 is an equidigital number, since it uses as much as digits as its factorization.

22142243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598476.

The product of its digits is 768, while the sum is 20.

The square root of 22142243 is about 4705.5544837989. The cubic root of 22142243 is about 280.8065308760.

Adding to 22142243 its reverse (34224122), we get a palindrome (56366365).

The spelling of 22142243 in words is "twenty-two million, one hundred forty-two thousand, two hundred forty-three".