235
+235 is the international calling code for Chad.
- Odd
- Composite
Where 235 fits
Why 235 is special
Lake Chad has shrunk by roughly 90 percent since the 1960s, affecting the water supply of tens of millions across four countries.
Same number, different meanings
How 235 is understood across different contexts — never implying one meaning because of another.
- Mathematics
Lake Chad has shrunk by roughly 90 percent since the 1960s, affecting the water supply of tens of millions across four countries.
- Science
Uranium-235 makes up about 0.72 percent of natural uranium. Reactor fuel is enriched to roughly 3 to 5 percent and weapons use far higher levels, which is why enrichment capacity is the central issue in nuclear proliferation.
- Geography
+235 reaches Chad. Lake Chad has lost the large majority of its surface area since the 1960s through drought and irrigation, which is among the clearest visible cases of large-scale hydrological change.
Factors & digit properties
- Divisors (4)
- 1, 5, 47, 235
- Prime factorisation
- 5 × 47
- Digit sum
- 10
- Digital root
- 1
Representations
- Decimal
- 235
- Binary
- 11101011
- Octal
- 353
- Hexadecimal
- eb
- Roman numeral
- CCXXXV
- Scientific notation
- 2.350 × 10^2
Other mathematical patterns
- Deficient number
- Semiprime
- Lucky number (mathematical sieve)
Related numbers & connections
Chad and the Central African Republic are both landlocked and among the least connected countries by road anywhere.
View 236 →Nearby in a sequence
- is adjacent to236
why?
Strength 0.50, confidence "high".
Science
Uranium-235 makes up about 0.72 percent of natural uranium. Reactor fuel is enriched to roughly 3 to 5 percent and weapons use far higher levels, which is why enrichment capacity is the central issue in nuclear proliferation.
DocumentedScienceGeography: GlobalPeriod: 1935–
Geography
+235 reaches Chad. Lake Chad has lost the large majority of its surface area since the 1960s through drought and irrigation, which is among the clearest visible cases of large-scale hydrological change.
DocumentedGeographyGeography: Chad
Common questions
Is 235 a prime number?
No, 235 is not prime.
What are the factors of 235?
The factors of 235 are 1, 5, 47, 235.
What is 235 in Roman numerals?
235 in Roman numerals is CCXXXV.
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: 3 August 2026