219 (number)

219 (two hundred [and] nineteen) is the natural number following 218 and preceding 220.

In mathematics

 * 219 is a happy number.
 * Mertens function (219) = 4, a record high.
 * There are 219 partially ordered sets on four labeled elements.
 * 219 is the smallest number that can be represented as a sum of four positive cubes in two different ways.
 * There are 219 different space groups, discrete and full-dimensional sets of symmetries of three-dimensional space or of crystal structures.