82
82 is the atomic number of lead — the heaviest element with a naturally occurring stable isotope.
- Even
- Composite
Where 82 fits
Why 82 is special
82's element marks a genuine boundary in the periodic table: nothing heavier than lead has a naturally stable isotope.
82 is part of
Factors & digit properties
- Divisors (4)
- 1, 2, 41, 82
- Prime factorisation
- 2 × 41
- Digit sum
- 10
- Digital root
- 1
Representations
- Decimal
- 82
- Binary
- 1010010
- Octal
- 122
- Hexadecimal
- 52
- Roman numeral
- LXXXII
- Scientific notation
- 8.200 × 10^1
Other mathematical patterns
- Deficient number
- Happy number
- Semiprime
Related numbers & connections
41 is a factor of 82 (41 × 2 = 82).
View 41 →83 and 82 are consecutive integers.
View 83 →Science
82 is the atomic number of lead, the heaviest element with a naturally occurring stable isotope.
DocumentedScience
Mathematics
82 factors as 2 × 41.
DocumentedMathematics
Common questions
Is 82 a prime number?
No, 82 is not prime.
What are the factors of 82?
The factors of 82 are 1, 2, 41, 82.
What is 82 in Roman numerals?
82 in Roman numerals is LXXXII.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026