275 (number)
{{Infobox number
| number = 275
| divisor = 1, 5, 11, 25, 55, 275
}}
275 (two hundred [and] seventy-five) is the natural number following 274 and preceding 276.
In mathematics
- 275 is an odd composite number with 2 prime factors.{{Cite web|url=https://mathworld.wolfram.com/CompositeNumber.html|title=Composite numbers|website=mathworld.wolfram.com}}
- 275 is equivalent to the number of partitions of 28 when no partition occurs only once. Partitions are the number of ways of writing a number as a sum of other positive integers.{{Cite web|url=https://mathworld.wolfram.com/Partition.html|title= Partition information|website=mathworld.wolfram.com}}
- 275 is the sum of fifth powers of the first two primes (2⁵ + 3⁵ = 275).
- 275 is the maximum number of pieces made by cutting an annulus with 22 cuts.{{cite OEIS|A000096|a(n) = n*(n+3)/2}}
- 275 is the smallest non semiprime that follows the equations n>1 and the greatest common denominator of n and bⁿ−b is 1 for some value of b.{{OEIS|A321487}}