519
IEEE 519 limits harmonic distortion on power systems.
- Odd
- Composite
Where 519 fits
Why 519 is special
Every switching power supply distorts the current it draws, and this standard is what stops a building full of them degrading the supply for everyone else.
519 is part of
Factors & digit properties
- Divisors (4)
- 1, 3, 173, 519
- Prime factorisation
- 3 × 173
- Digit sum
- 15
- Digital root
- 6
Representations
- Decimal
- 519
- Scientific notation
- 5.190 × 10^2
Roman numerals
D X I X
DXIX uses the subtractive pair IX: one before ten — ten minus one.
Binary
1 0 0 0 0 0 0 1 1 1
1 × 512 + 0 × 256 + 0 × 128 + 0 × 64 + 0 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 1 × 2 + 1 × 1 = 519
Octal
1 0 0 7
1 × 512 + 0 × 64 + 0 × 8 + 7 × 1 = 519
Hexadecimal
2 0 7
2 × 256 + 0 × 16 + 7 × 1 = 519
Read as powers of two: 512 + 4 + 2 + 1 = 519.
In historical numeral systems
Egyptian
5 coils of rope, 1 hobble, 9 strokes
5 × 100 + 1 × 10 + 9 × 1 = 519. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
8 vertical wedges (sixties place), 3 corner wedges + 9 vertical wedges (units place)
8 × 60 + 39 = 519. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
phi, then iota, then theta, marked as a numeral
phi-iota-theta + keraia
phi + iota + theta 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 yod, then tet
tav-qof-yod-tet
tav (400) + qof (100) + yod (10) + tet (9) = 519, 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
- Deficient number
- Semiprime
- Lucky number (mathematical sieve)
Related numbers & connections
IEEE 519 labels harmonic limits and is cited by number in electrical installation contracts.
Harmonic limits and electromagnetic compatibility both constrain the disturbance a device may impose on shared infrastructure.
View 61000 →Numbers Around Us
- appears inNumbers assigned as identifiers
why?
Strength 0.50, confidence "high".
Other connections
- is associated with61000
why?
Strength 0.50, confidence "high".
Technology & computing
IEEE 519 sets recommended limits for harmonic voltage and current distortion at the point of common coupling, allocating responsibility between the utility and the customer.
DocumentedTechnology & computingGeography: International — IEEEPeriod: 1981–
Common questions
Is 519 a prime number?
No, 519 is not prime.
What are the factors of 519?
The factors of 519 are 1, 3, 173, 519.
What is 519 in Roman numerals?
519 in Roman numerals is DXIX. IX is subtractive: one before ten — ten minus one. Written additively it would be DXVIIII, which Roman inscriptions used freely — the strict subtractive form is a later convention.
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