54 is the smallest number that can be written as the sum of 3 squares in 3 ways.
The Chemical Element Xenon has an atomic number of 54.
In the year 54 AD Ban Biao, Chinese historian, died.
In the year 54 AD Apollos, a later assistant of Paul, wass converted to Christianity in Ephesus.
There are 54 countries in Africa, and a couple of disputed territories (Western Sahara and Somaliland). South Sudan is Africa's newest country, officially born on July 9, 2011.
There are 54 facelets on a Rubik's Cube.
The 54th amino acid in the 153-residue sequence of sperm whale myoglobin
is Glutamic Acid (E). It is next to Alanine-53 & Methionine-55 (you really don't want to know how I know that).
M54 is a quite conspicuous globular cluster, although Charles Messier,
who discovered it on July 24, 1778, describes it as 'very faint' from his location in Paris.
One French ell, or thread, is 54 inches.
'Fifty-Four Forty or Fight' was a political slogan that became popular
in the United States by early 1846, calling for the annexation of the entire
Oregon Country up to latitude 54o40' N, the northern boundary of the region.
In 54 BC— Julius Caesar invades Britain. He fails to conquer the islands (but claims he won, anyway), but he does open them to Roman trade and influence. Caesar's daughter Julia, who is married to Pompey, dies. Triumvirate that rules Rome begins to break up.
54 is used as a code for international direct dial phone calls to Argentina.
Joe DiMaggio's 54th consecutive hit-game occurred on July 14, 1941 when he got a hit off Johnny Rigney of the Chicago White Sox. I believe his run lasted for 56 games.
Fewest points made in a NBA playoff game is 54 by Utah at Chicago (96) on June 7, 1998 (as of 2000).
A deck of playing cards has 54 face designs (52 cards + 2 jokers).
'I've only been doing this fifty-four years. With a little experience, I might get better.' - Harry Caray
In Numerology, the letters of the words 'Fifty-Four' add up to ... 54.
I am a Star Wars fan. That doesn't mean that I hate or love Jar Jar. That doesn't mean I hate or love Lucas, or agree or disagree 100% with him. That doesn't mean I prefer the PT over the OT, or vice versa. That doesn't mean I hate the EU, or even love all of it (or even read all of it). These are not prerequisites. Being a man is not a prerequisite. Being a geek is not a prerequisite. The only prerequisite is that I love something about Star Wars. I am a Star Wars fan.