555 (number)
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555 is the natural number following 554 and preceding 556.
| 555 | |
|---|---|
| Cardinal | Five hundred [and] fifty-five |
| Ordinal | 555th |
| Factorization | <math>3 \cdot 5 \cdot 37<math> |
| Roman numeral | DLV |
| Binary | 1000101011 |
| Hexadecimal | 22B |
Mathematical properties
It is a sphenic number, a repdigit and a Harshad number.
Other fields
Five hundred and fify five is:
- The telephone exchange for fictitious phone numbers in US movies - see 555 telephone number and North American Numbering Plan.
- A tongue twister in German. Try saying Fünfhundertfünfundfünfzig three times fast.
- The number of keyboard sonatas written by Domenico Scarlatti, according to the catalog by Ralph Kirkpatrick.
- the model number of the 555 timer IC, a classic integrated circuit (chip) implementing a variety of timer and multivibrator applications, and historically widely used in electronics.
- The years AD 555 and 555 BC.
See also: five hundred
External link
- 555-LIST (http://home.earthlink.net/~mthyen) list of fictional phone numbers