5218
ISO/IEC 5218 codes the representation of human sexes.
- Even
- Composite
Where 5218 fits
Why 5218 is special
Its four values — 0 not known, 1 male, 2 female, 9 not applicable — are embedded in enormous numbers of databases, and the codes are widely criticised as too coarse for the uses they get put to.
5218 is part of
Factors & digit properties
- Divisors (4)
- 1, 2, 2609, 5218
- Prime factorisation
- 2 × 2609
- Digit sum
- 16
- Digital root
- 7
Representations
- Decimal
- 5218
- Scientific notation
- 5.218 × 10^3
Roman numerals
Roman numerals as modelled here goes up to 3,999.
Binary
1 0 1 0 0 0 1 1 0 0 0 1 0
1 × 4,096 + 0 × 2,048 + 1 × 1,024 + 0 × 512 + 0 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 0 × 4 + 1 × 2 + 0 × 1 = 5,218
Octal
1 2 1 4 2
1 × 4,096 + 2 × 512 + 1 × 64 + 4 × 8 + 2 × 1 = 5,218
Hexadecimal
1 4 6 2
1 × 4,096 + 4 × 256 + 6 × 16 + 2 × 1 = 5,218
Read as powers of two: 4,096 + 1,024 + 64 + 32 + 2 = 5,218.
In historical numeral systems
Egyptian
5 lotuses, 2 coils of rope, 1 hobble, 8 strokes
5 × 1,000 + 2 × 100 + 1 × 10 + 8 × 1 = 5,218. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
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
- Happy number
- Semiprime
Related numbers & connections
Both are short numeric or alphabetic codes for interchange rather than for describing people or places accurately.
View 3166 →Other connections
- is associated with3166
why?
Strength 0.50, confidence "high".
Technology & computing
ISO/IEC 5218 defines numeric codes for sex in information interchange. The standard addresses data interchange rather than identity, and its four values are frequently reused for purposes it does not cover.
DocumentedTechnology & computingGeography: International — ISO member bodiesPeriod: 1976–
Common questions
Is 5218 a prime number?
No, 5218 is not prime.
What are the factors of 5218?
The factors of 5218 are 1, 2, 2609, 5218.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026