- Numerology: words whose letters add up to 55
- Hemoglobin = 8 + 5 + 4 + 6 + 7 + 3 + 6 + 2 + 9 + 5 = 55
- Universal Self = (3 + 5 + 9 + 4 + 5 + 9 + 1 + 1 + 3) + (1 + 5 + 3 + 6) = 40 + 15 = 55
- The 10th Fibonacci number = 1, 1, 2, 3, 5, 8, 13, 21, 34, 55
- Sum of 5 odd heavenly numbers = 1+3+5+7+9 = 25
- Sum of 5 even earthly numbers = 2+4+6+8+10 = 30
- Sum of the heavenly & earthly series (I Ching) = 25 + 30 = 55
- A song produced by Group X was called “Schfifty Five”. With the addition of a flash animation, “Schfifty Five” became a common internet meme
- The 5th Pyramidal number = 1, 5, 14, 30, 55
- In years of marriage, the emerald wedding anniversary
- Atomic Number of Cesium (Cs) = 55
- The name of a song by British Indie Rock Band Kasabian. The song was released as a B side to Club Foot and was recorded live when the band performed at London’s Brixton Academy.
- Sammy Hagar sang “I Can’t Drive 55“
- Tom Waits (and later Sarah McLachlan) sang “Ol’ 55“
- Cristian Vogel released an album in 2005 with the title “Station 55“
- Primer 55 an American band
- Andrew W.K. has an album called 55 Cadillac which contains the track “5″ which is track five on the album, making it look like 55 in the tracklisting.
- The number of Delegates who attended the United States Constitutional Convention in 1787, 55
- In US gallons, a common size of drum containing liquids; see 44 gallon drum
- In miles per hour,
- the highest speed limit allowed in the United States between 1974 and 1986 per the National Maximum Speed Law was 55
- In many states of the United States, a very common speed limit of 55 for rural secondary roads and many urban freeways.
- The code for international direct dial phone calls to Brazil
- The number of European route E55 from Helsingborg, Sweden to Greece
- Restaurant slang for root beer is 55
- The number of Sacha Baron Cohen‘s character, Jean Girard, in the 2006 film Talladega Nights: The Ballad of Ricky Bobby. In real life, however, it is the number of Michael Waltrip
- In sports, the jersey number “55” is also known as “Double Nickels” or “Double Nicks”.
- In the dice game of craps, if you roll two 5s or a “55” this is commonly known as a hard 10 or double nickels.
- Year identifier used on motor vehicles registered in the UK between 1st September 2005 and 28th February 2006 is 55
- The 55th day of the year = February 24
- Pro Blend 55 Mocha Cappuccino mix
- 55th word of the King James Version of the Bible’s Old Testament Genesis = light
- The designation of I-55, a freeway that runs from Louisiana to Illinois
- Britvic 55, a soft drink brand in the UK
- There are 55 languages recorded on the Voyager Golden Record
- Adolf Hitler was the fifty-fifth member of the National Socialist German Workers Party
- The number of the French department Meuse is 55