275

275 is a natural number that follows 274 and precedes 276. It is an odd, composite number with prime factorization 5^2 × 11.

The divisors of 275 are 1, 5, 11, 25, 55, and 275. The sum of its proper divisors is 97, which is less than 275, so 275 is a deficient number. It is not a prime, nor a perfect square. In Roman numerals it is written as CCLXXV. In binary it equals 100010011, and in hexadecimal it is 0x113. The decimal digits sum to 14, giving a digital root of 5.

275 has different representations across numeral systems and can be expressed as 11 × 25. Because it contains a squared prime factor, it is not square-free. Its factorization also shows that it has more than two divisors, distinguishing it from prime or semiprime numbers.

In calendar and historical contexts, 275 appears as a year in the common era, placing it in late antiquity. Like many integers, 275 also appears in various non-mathematical contexts such as model numbers, catalog entries, or numerals used for labeling in different systems.

Overall, 275 is a small, structured composite number with a clear prime factorization, standard positional representations, and typical arithmetic properties used in number theory.