243
+243 is the international calling code for Democratic Republic of the Congo.
- Odd
- Composite
Where 243 fits
Why 243 is special
The DRC is the second-largest country in Africa and holds most of the world's cobalt, which makes its mining sector central to battery supply chains far from it.
Factors & digit properties
- Divisors (6)
- 1, 3, 9, 27, 81, 243
- Prime factorisation
- 3^5
- Digit sum
- 9
- Digital root
- 9
Representations
- Decimal
- 243
- Binary
- 11110011
- Octal
- 363
- Hexadecimal
- f3
- Roman numeral
- CCXLIII
- Scientific notation
- 2.430 × 10^2
Other mathematical patterns
- Deficient number
- Powerful number
- Harshad (Niven) number
Related numbers & connections
The Democratic Republic of the Congo and Angola share a long border, and both are dominated economically by minerals — cobalt and oil respectively.
View 244 →Geography
+243 reaches the Democratic Republic of the Congo, which supplies the majority of the world's cobalt. Battery production anywhere depends on a mineral concentrated almost entirely in one country.
DocumentedGeographyGeography: Democratic Republic of the Congo
Common questions
Is 243 a prime number?
No, 243 is not prime.
What are the factors of 243?
The factors of 243 are 1, 3, 9, 27, 81, 243.
What is 243 in Roman numerals?
243 in Roman numerals is CCXLIII.
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