Adding to 16218 its reverse (81261), we get a palindrome (97479).
It is a zygodrome in base 4.
It is a self number, because there is not a number n which added to its sum of digits gives 16218.
216218 is an apocalyptic number.
16218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 16218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18954).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
16218 is a wasteful number, since it uses less digits than its factorization.
16218 is an evil number, because the sum of its binary digits is even.
The square root of 16218 is about 127.3499116607. The cubic root of 16218 is about 25.3123479643.
The spelling of 16218 in words is "sixteen thousand, two hundred eighteen".