1331
1331 is a year in the 14th century. Stefan Dusan took the Serbian throne and expanded the state to its greatest extent (Serbia).
Where 1331 fits
Why 1331 is special
1331 has a profile because of what happened in it rather than because of any property of the number: Stefan Dusan took the Serbian throne and expanded the state to its greatest extent (Serbia).
1331 is part of
Factors & digit properties
- Divisors (4)
- 1, 11, 121, 1331
- Prime factorisation
- 11^3
- Digit sum
- 8
- Digital root
- 8
Representations
- Decimal
- 1331
- Scientific notation
- 1.331 × 10^3
Roman numerals
M C C C X X X I
Binary
1 0 1 0 0 1 1 0 0 1 1
1 × 1,024 + 0 × 512 + 1 × 256 + 0 × 128 + 0 × 64 + 1 × 32 + 1 × 16 + 0 × 8 + 0 × 4 + 1 × 2 + 1 × 1 = 1,331
Octal
2 4 6 3
2 × 512 + 4 × 64 + 6 × 8 + 3 × 1 = 1,331
Hexadecimal
5 3 3
5 × 256 + 3 × 16 + 3 × 1 = 1,331
Read as powers of two: 1,024 + 256 + 32 + 16 + 2 + 1 = 1,331.
In historical numeral systems
Egyptian
1 lotus, 3 coils of rope, 3 hobbles, 1 stroke
1 × 1,000 + 3 × 100 + 3 × 10 + 1 × 1 = 1,331. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges + 2 vertical wedges (sixties place), 1 corner wedge + 1 vertical wedge (units place)
22 × 60 + 11 = 1331. Places are separated by a space on the tablet, with the higher place written first.
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
- Palindromic number
- Deficient number
- Powerful number
Related numbers & connections
1331 is a year in the 14th century, in the 1330s.
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
History
In 1331, Stefan Dusan took the Serbian throne and expanded the state to its greatest extent (Serbia).
DocumentedHistoryGeography: SerbiaPeriod: 1331
Common questions
Is 1331 a prime number?
No, 1331 is not prime.
What are the factors of 1331?
The factors of 1331 are 1, 11, 121, 1331.
What is 1331 in Roman numerals?
1331 in Roman numerals is MCCCXXXI.
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