218
+218 is the international calling code for Libya.
- Even
- Composite
Where 218 fits
Why 218 is special
Libya completes the 21x North African range with Morocco, Algeria and Tunisia. Its telecommunications infrastructure has been repeatedly disrupted since 2011, and international connectivity has at times depended on a single cable.
Same number, different meanings
How 218 is understood across different contexts — never implying one meaning because of another.
- Mathematics
Libya completes the 21x North African range with Morocco, Algeria and Tunisia. Its telecommunications infrastructure has been repeatedly disrupted since 2011, and international connectivity has at times depended on a single cable.
- Geography
+218 reaches Libya. Its telecommunications infrastructure has been repeatedly disrupted since 2011, and international connectivity has at times depended on one cable — which makes the code a reminder that a numbering plan assumes a network underneath it.
- Media & popular culture
K. 218 is the fourth violin concerto. No autograph survives, and the authenticity of some readings in the transmitted text has been questioned.
Factors & digit properties
- Divisors (4)
- 1, 2, 109, 218
- Prime factorisation
- 2 × 109
- Digit sum
- 11
- Digital root
- 2
Representations
- Decimal
- 218
- Scientific notation
- 2.180 × 10^2
Roman numerals
C C X V I I I
Binary
1 1 0 1 1 0 1 0
1 × 128 + 1 × 64 + 0 × 32 + 1 × 16 + 1 × 8 + 0 × 4 + 1 × 2 + 0 × 1 = 218
Octal
3 3 2
3 × 64 + 3 × 8 + 2 × 1 = 218
Hexadecimal
d a
d × 16 + a × 1 = 218
Read as powers of two: 128 + 64 + 16 + 8 + 2 = 218.
In historical numeral systems
Egyptian
2 coils of rope, 1 hobble, 8 strokes
2 × 100 + 1 × 10 + 8 × 1 = 218. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
3 vertical wedges (sixties place), 3 corner wedges + 8 vertical wedges (units place)
3 × 60 + 38 = 218. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
sigma, then iota, then eta, marked as a numeral
sigma-iota-eta + keraia
sigma + iota + eta written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
resh, then yod, then het
resh-yod-het
resh (200) + yod (10) + het (8) = 218, written in descending order.
Maya
2 bars (upper, twenties place) over 3 bars + 3 dots (lower, units place)
10 × 20 + 18 = 218. Places stack vertically with the smallest at the bottom, so the upper group is worth twenty times the lower.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Deficient number
- Semiprime
Geography
+218 reaches Libya. Its telecommunications infrastructure has been repeatedly disrupted since 2011, and international connectivity has at times depended on one cable — which makes the code a reminder that a numbering plan assumes a network underneath it.
DocumentedGeographyGeography: Libya
Media & popular culture
K. 218 is the fourth violin concerto. No autograph survives, and the authenticity of some readings in the transmitted text has been questioned.
DocumentedMedia & popular cultureGeography: AustriaPeriod: 1775
Common questions
Is 218 a prime number?
No, 218 is not prime.
What are the factors of 218?
The factors of 218 are 1, 2, 109, 218.
What is 218 in Roman numerals?
218 in Roman numerals is CCXVIII.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026