Numberblocks Wiki

Fifty-Five, or 55, is a Numberblock made up of 55 blocks.


Fifty-Five has 50 sky blue blocks with blue borders and 5 cyan blocks. His limbs are navy blue. He wears a white mask with red borders and has a maroon mouth.

Episode Appearances


  • "Engage!"
  • "Starship explorer Fifty-Five, first interplanetary mission underway!"


  • 55 is the first and currently only Numberblock in the 50s to be figured-out.
  • 55 is the second “5 ender” to be male, with the first being 35.
  • 55 can be a big blue space rocket, and a step squad.
  • 55 is the first Step Squad to have a permanent mask but no boots.
  • 55 is so far the only multiple of 11 to have eyes that are the same size.
    • Some fans think that his eyes are actually different-sized, it's just the eyeholes on the stepmask that are the same size.
  • 55 is the tenth step squad, following 1, 3, 6, 10, 15, 21, 28, 36 and 45.



Starship explorer Fifty-Five is mostly seen as a rocket ship, but he also occasionally appears as a step shape or in a 5x11 rectangle.

2D (16/17,326,987,021,737,904,384,935,434,351,490)