555 (number)
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Cardinal | five hundred fifty-five | |||
Ordinal |
555th (five hundred fifty-fifth) | |||
Factorization | 3 × 5 × 37 | |||
Roman numeral | DLV | |||
Binary | 10001010112 | |||
Ternary | 2021203 | |||
Quaternary | 202234 | |||
Quinary | 42105 | |||
Senary | 23236 | |||
Octal | 10538 | |||
Duodecimal | 3A312 | |||
Hexadecimal | 22B16 | |||
Vigesimal | 17F20 | |||
Base 36 | FF36 |
555 is the natural number following 554 and preceding 556.
Mathematical properties
It is a sphenic number.
In base 10, it is a repdigit, and because it is divisible by the sum of its digits, it is a Harshad number. It is also a Harshad number in binary, base 11, base 13 and hexadecimal.
Electronics
- 555 timer IC, a classic integrated circuit chip that has numerous timer and multivibrator applications, and historically widely used in electronics
Other fields
Five hundred [and] fifty five is:
- The years AD 555 and 555 BC.
- The telephone exchange for fictitious phone numbers in US movies and video games—see 555 (telephone number) and North American Numbering Plan.
- The number of keyboard sonatas written by Domenico Scarlatti, according to the catalog by Ralph Kirkpatrick.
- A musical piece by Frank Zappa (Five-Five-FIVE). It refers to the time signature of the composition (5/8 - 5/8 - 5/4).
- The Thai version of lol in a text conversation. "5" in Thai is pronounced "ha", so three of them would be "hahaha."
- "5" in Mandarin Chinese is pronounced "wu" so three together would be "wuwuwu", which sounds somewhat like sobbing.
- The approximate height of the Washington Monument in feet.
- Adolf Hitler's membership number in the Deutsche Arbeiterpartei (DAP). He was the 55th member; the founders began the register with number 501, to make it appear that there were many more people in the party ranks than actually were members.
- The Greek gematrical equivalent to the word Necronomicon, according to Simon.
- Kamen Rider 555, a Japanese tokusatsu TV series, where "555" is read as "Φ's", "Phi's", or "Faiz".
- A common abbreviation of State Express 555, a cigarette brand owned by British American Tobacco.
- State Express 555's sponsorship of motorsport lent the number as branding livery to racecars in Formula One and the World Rally Championship.
- 5:55 (pronounced in English "five fifty-five") is the second album by French musician and actress Charlotte Gainsbourg. "5:55" is also the first song on this album.
- Padova Rugby 555 ASD is an Italian non-professional rugby union team.
- The band Phish has a song called '555' on their album Fuego.
See also
External links
Wikimedia Commons has media related to 555 (number). |
- 555-LIST list of fictional phone numbers
- Explanation of the song 'Heretic Anthem' by Slipknot which features 555 in the lyrics
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