543
K. 543 is the first of the final three symphonies.
- Odd
- Composite
Where 543 fits
Why 543 is special
Mozart wrote all three in about six weeks in 1788 with no known commission and no record of ever hearing them performed.
Factors & digit properties
- Divisors (4)
- 1, 3, 181, 543
- Prime factorisation
- 3 × 181
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 543
- Binary
- 1000011111
- Octal
- 1037
- Hexadecimal
- 21f
- Roman numeral
- DXLIII
- Scientific notation
- 5.430 × 10^2
Other mathematical patterns
- Deficient number
- Semiprime
Related numbers & connections
Both are Mozart works for which no commission or first performance is documented.
View 525 →Media & popular culture
K. 543 is the first of the symphonies numbered 39, 40 and 41, composed within roughly six weeks in summer 1788. No commission or documented performance survives.
DocumentedMedia & popular cultureGeography: AustriaPeriod: 1788
Common questions
Is 543 a prime number?
No, 543 is not prime.
What are the factors of 543?
The factors of 543 are 1, 3, 181, 543.
What is 543 in Roman numerals?
543 in Roman numerals is DXLIII.
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: 3 August 2026