217 is the natural number following 216 and preceding 218.

Here are the representations of 217 in other numeral systems:

217 is a centered hexagonal number, a 12-gonal number, a centered 36-gonal number, and a Blum integer.^[1] It is both the sum of two positive cubes and the difference of two positive consecutive cubes in exactly one way: 217 = 6^3 + 1^3 = 9^3 - 8^3. When written in binary, it is a non-repetitive Kaprekar number.^[2]

See also

• The year 217
• 217 is the area code for central Illinois
• In Stephen King's novel "The Shining", room 217 plays a central part of the story as it is haunted.
• When read upside-down on a digital clock, it appears to say "LIZ"

References

az:217 ( d d) ca:Nombre 210 eu:Berrehun eta hamazazpi fa: ( ) fr:217 (nombre) ko:217 it:217 (numero) ht:217 (nonm) hu:217 (sz m) mk:217 ( ) ms:217 (nombor) ja:217 ru:217 ( ) nso:217 (nomoro) uk:217 ( ) zh:217