55 fiveThe Fifty Five Fifty offers residents an unparalleled vertical living experience stitched into the urban fabric of Hollywood. This energized, pet-friendly community features open-concept55 is a square pyramidal number. 55 is: . the 10th Fibonacci number [1] and the 10th triangular number, [2] The sum of 55's dits is also 10.; the 5th heptagonal number, [3] the 5th square