Fatto generale: 2184 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2184 is the product of three consecutive Fibonacci numbers.
Trivia: 2184 is an uninteresting number.
Data storica: December 23rd is the day in 2003 that PetroChina Chuandongbei natural gas field explosion, Guoqiao, Kai County, Chongqing, China, killing at least 234.