550
K.550 is Mozart's Symphony No. 40 in G minor.
- Even
- Composite
Where 550 fits
Why 550 is special
It is one of only two symphonies he wrote in a minor key. There is no record of it being performed in his lifetime, which is true of a great deal of music now considered central.
550 connects to:
- 626 — is associated with
Same number, different meanings
How 550 is understood across different contexts — never implying one meaning because of another.
- Mathematics
It is one of only two symphonies he wrote in a minor key. There is no record of it being performed in his lifetime, which is true of a great deal of music now considered central.
- Technology & computing
The Porsche 550 Spyder was a successful 1950s sports racing car. It is now most widely known as the car in which the actor James Dean died in September 1955.
- Culture
Mozart's Symphony No. 40 has no documented performance during his life. Whether he ever heard it played is unknown, which is a common situation for eighteenth-century orchestral music.
- Media & popular culture
K. 550 is one of only two Mozart symphonies in a minor key, and it exists in two versions differing in whether clarinets are present.
Factors & digit properties
- Divisors (12)
- 1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 275, 550
- Prime factorisation
- 2 × 5^2 × 11
- Digit sum
- 10
- Digital root
- 1
Representations
- Decimal
- 550
- Scientific notation
- 5.500 × 10^2
Roman numerals
D L
Binary
1 0 0 0 1 0 0 1 1 0
1 × 512 + 0 × 256 + 0 × 128 + 0 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 1 × 2 + 0 × 1 = 550
Octal
1 0 4 6
1 × 512 + 0 × 64 + 4 × 8 + 6 × 1 = 550
Hexadecimal
2 2 6
2 × 256 + 2 × 16 + 6 × 1 = 550
Read as powers of two: 512 + 32 + 4 + 2 = 550.
In historical numeral systems
Egyptian
5 coils of rope, 5 hobbles
5 × 100 + 5 × 10 = 550. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
9 vertical wedges (sixties place), 1 corner wedge (units place)
9 × 60 + 10 = 550. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
phi, then nu, marked as a numeral
phi-nu + keraia
phi + nu written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
tav, then qof, then nun
tav-qof-nun
tav (400) + qof (100) + nun (50) = 550, written in descending order.
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
- Abundant number
- Harshad (Niven) number
Related numbers & connections
Köchel numbers order Mozart's works chronologically, so K.550 and K.626 are separated by his last three years.
View 626 →Other connections
- is associated with626
why?
Strength 0.50, confidence "high".
Technology & computing
The Porsche 550 Spyder was a successful 1950s sports racing car. It is now most widely known as the car in which the actor James Dean died in September 1955.
DocumentedTechnology & computingGeography: Germany and United StatesPeriod: 1953–1956
Culture
Mozart's Symphony No. 40 has no documented performance during his life. Whether he ever heard it played is unknown, which is a common situation for eighteenth-century orchestral music.
DocumentedCultureGeography: AustriaPeriod: 1788
Media & popular culture
K. 550 is one of only two Mozart symphonies in a minor key, and it exists in two versions differing in whether clarinets are present.
DocumentedMedia & popular cultureGeography: AustriaPeriod: 1788
Common questions
Is 550 a prime number?
No, 550 is not prime.
What are the factors of 550?
The factors of 550 are 1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 275, 550.
What is 550 in Roman numerals?
550 in Roman numerals is DL.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 3 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026