2182
2,182 kilohertz is the international maritime distress frequency for medium-wave radiotelephony.
- Even
- Composite
Where 2182 fits
Why 2182 is special
For decades every ship kept a silent period on it twice an hour, three minutes from the hour and the half hour, so a weak call for help could be heard through the traffic. Satellite alerting has largely replaced the practice, but the frequency is still guarded and the silence is still observed by some.
2182 is part of
Factors & digit properties
- Divisors (4)
- 1, 2, 1091, 2182
- Prime factorisation
- 2 × 1091
- Digit sum
- 13
- Digital root
- 4
Representations
- Decimal
- 2182
- Scientific notation
- 2.182 × 10^3
Roman numerals
M M C L X X X I I
Binary
1 0 0 0 1 0 0 0 0 1 1 0
1 × 2,048 + 0 × 1,024 + 0 × 512 + 0 × 256 + 1 × 128 + 0 × 64 + 0 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 1 × 2 + 0 × 1 = 2,182
Octal
4 2 0 6
4 × 512 + 2 × 64 + 0 × 8 + 6 × 1 = 2,182
Hexadecimal
8 8 6
8 × 256 + 8 × 16 + 6 × 1 = 2,182
Read as powers of two: 2,048 + 128 + 4 + 2 = 2,182.
In historical numeral systems
Egyptian
2 lotuses, 1 coil of rope, 8 hobbles, 2 strokes
2 × 1,000 + 1 × 100 + 8 × 10 + 2 × 1 = 2,182. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
3 corner wedges + 6 vertical wedges (sixties place), 2 corner wedges + 2 vertical wedges (units place)
36 × 60 + 22 = 2182. 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
- Deficient number
- Semiprime
Related numbers & connections
2182 appears in Numbers in radio and communications, the topic covering numbers that carry a documented radio or communications fact.
Numbers Around Us
- appears inRadio and communications
why?
Strength 0.50, confidence "high".
Technology & computing
The international maritime distress frequency for medium-wave radiotelephony is 2182 kilohertz (worldwide, maritime mobile service). Silence periods were observed on it for three minutes twice an hour so a weak call could be heard. Satellite distress alerting has taken over the role, and the watch requirement has been withdrawn.
DocumentedTechnology & computingGeography: worldwide, maritime mobile service
Common questions
Is 2182 a prime number?
No, 2182 is not prime.
What are the factors of 2182?
The factors of 2182 are 1, 2, 1091, 2182.
What is 2182 in Roman numerals?
2182 in Roman numerals is MMCLXXXII.
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