216750 has 48 divisors (see below), whose sum is σ = 574704. Its totient is φ = 54400.

The previous prime is 216743. The next prime is 216751. The reversal of 216750 is 57612.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12742 + ... + 12758.

It is an arithmetic number, because the mean of its divisors is an integer number (11973).

2²¹⁶⁷⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287352).

216750 is an abundant number, since it is smaller than the sum of its proper divisors (357954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216750 is a wasteful number, since it uses less digits than its factorization.

216750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 216750 is about 465.5641738794. The cubic root of 216750 is about 60.0693642236.

The spelling of 216750 in words is "two hundred sixteen thousand, seven hundred fifty".