It is a Curzon number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216546.
It is an unprimeable number.
216546 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2216546 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 216546, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251424).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
216546 is a wasteful number, since it uses less digits than its factorization.
216546 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 226.
The square root of 216546 is about 465.3450332818. The cubic root of 216546 is about 60.0505130175.
The spelling of 216546 in words is "two hundred sixteen thousand, five hundred forty-six".