• Source: 55 (number)

55 (fifty-five) is the natural number following 54 and preceding 56.




Mathematics


55 is the 10th Fibonacci number and the 10th triangular number, where 10 is the sum of 55's digits. It's the 5th heptagonal number, the 5th square pyramidal number, and the 4th centered nonagonal number.
55 is also the 15th squarefree semiprime, and the 19th semiprime, as well as the 32nd nontotient number (including odd numbers > 1), the 36th arithmetic number, the 38th composite number (where the abundance of 55 = - 38), the 43rd deficient number, the 45th trapezoidal number , and the 49th polite number.




Science


The atomic number of caesium.




= Astronomy

=
Messier object M55, a magnitude 7.0 globular cluster in the constellation Sagittarius
The New General Catalogue object NGC 55, a magnitude 7.9 barred spiral galaxy in the constellation Sculptor




Music


The name of a song by 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.
"55", a song by Mac Miller
"I Can't Drive 55", a song by Sammy Hagar
"Ol' '55", a song by Tom Waits
Ol' 55 (band), an Australian rock band.
Primer 55 an American band
Station 55, an album released in 2005 by Cristian Vogel
55 Cadillac, an album by Andrew W.K.




Transportation


In the United States, the National Maximum Speed Law prohibited speed limits higher than 55 miles per hour (90 km/h) from 1974 to 1987.




Film


55 Days at Peking a film starring Charlton Heston and David Niven




Other uses


Gazeta 55, an Albanian newspaper
Agitation and Propaganda against the State, also known as Constitution law 55, a law during Communist Albania.
The code for international direct dial phone calls to Brazil
A 55-gallon drum for containing oil, etc.
The Élysée, the official residency of the French Republic president, which address is 55 rue du Faubourg-Saint-Honoré in Paris.




See also


55th Regiment of Foot (disambiguation)
Channel 55 (disambiguation)
Type 55 (disambiguation)
Class 55 (disambiguation)
List of highways numbered 55




References

Kata Kunci Pencarian:

• 55 (angka)
• Bilangan oktan
• I Am Number Four (film)
• Back Number
• International Securities Identification Number
• Mr. & Mrs. '55
• Gene Gauntier
• Love Scene Number
• Kleopatra
• Garamantes
• 55 (number)
• Number 55
• 55
• List of highways numbered 55
• 7
• Kh-55
• 55 Cancri
• 56 (number)
• LV
• U.S. Route 55