22438143 has 24 divisors (see below), whose sum is σ = 39891488. Its totient is φ = 11835072.

The previous prime is 22438139. The next prime is 22438151. The reversal of 22438143 is 34183422.

It is not a de Polignac number, because 22438143 - 2² = 22438139 is a prime.

It is a super-2 number, since 2×22438143² = 1006940522576898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22438123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12880 + ... + 14517.

Almost surely, 2^22438143 is an apocalyptic number.

22438143 is a deficient number, since it is larger than the sum of its proper divisors (17453345).

22438143 is a wasteful number, since it uses less digits than its factorization.

22438143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27423 (or 27420 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 22438143 is about 4736.8917023719. The cubic root of 22438143 is about 282.0518615950.

The spelling of 22438143 in words is "twenty-two million, four hundred thirty-eight thousand, one hundred forty-three".