22443 has 4 divisors (see below), whose sum is σ = 29928. Its totient is φ = 14960.

The previous prime is 22441. The next prime is 22447. The reversal of 22443 is 34422.

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 22443 - 2¹ = 22441 is a prime.

It is a D-number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (22441) 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, 3738 + ... + 3743.

It is an arithmetic number, because the mean of its divisors is an integer number (7482).

2²²⁴⁴³ is an apocalyptic number.

22443 is a deficient number, since it is larger than the sum of its proper divisors (7485).

22443 is an equidigital number, since it uses as much as digits as its factorization.

22443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7484.

The product of its digits is 192, while the sum is 15.

The square root of 22443 is about 149.8098795140. The cubic root of 22443 is about 28.2072211275.

Adding to 22443 its reverse (34422), we get a palindrome (56865).

It can be divided in two parts, 22 and 443, that added together give a triangular number (465 = T₃₀).

The spelling of 22443 in words is "twenty-two thousand, four hundred forty-three", and thus it is an iban number.