16443 has 20 divisors (see below), whose sum is σ = 29040. Its totient is φ = 9072.

The previous prime is 16433. The next prime is 16447. The reversal of 16443 is 34461.

It is not a de Polignac number, because 16443 - 2⁴ = 16427 is a prime.

It is a super-3 number, since 3×16443³ = 13337192670921, which contains 333 as substring.

Its product of digits (288) is a multiple of the sum of its prime factors (48).

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (16447) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 553 + ... + 581.

It is an arithmetic number, because the mean of its divisors is an integer number (1452).

16443 is a deficient number, since it is larger than the sum of its proper divisors (12597).

16443 is an equidigital number, since it uses as much as digits as its factorization.

16443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48 (or 39 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 16443 is about 128.2302616390. The cubic root of 16443 is about 25.4288675037.

Adding to 16443 its sum of digits (18), we get a palindrome (16461).

The spelling of 16443 in words is "sixteen thousand, four hundred forty-three".