275 (number)

← 274 275 276 →
← 200 210 220 230 240 250 260 270 280 290 → List of numbers Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	two hundred seventy-five
Ordinal	275th (two hundred seventy-fifth)
Factorization	52 × 11
Divisors	1, 5, 11, 25, 55, 275
Greek numeral	ΣΟΕ´
Roman numeral	CCLXXV
Binary	1000100112
Ternary	1010123
Senary	11356
Octal	4238
Duodecimal	1AB12
Hexadecimal	11316

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. ^[1]
• 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. ^[2]
• 275 is the sum of fifth powers of the first two primes (2^5 + 3^5 = 275).
• 275 is the maximum number of pieces made by cutting an annulus with 22 cuts. ^[3]
• 275 is the smallest non semiprime that follows the equations n>1 and the greatest common denominator of n and b^n-b is 1 for some value of b. ^[4]

World Records

• In May 2011, Angry Birds ended its 275 day streak of the best-selling app in the Apple App Store. ^[5]
• On November 14, 2007, the Guinness World Record for the greatest number of people dressed as mobile phones at 275 people. It was completed in Puerto Rico. ^[6]
• On April 11, 2015, the largest welding lesson was completed in Willowbrook, Illinois. There were 275 attendees. ^[7]
• The greatest number of certificates that a show dog earned as 275 certificates. It was earned by German Shepherd Mystique. ^[8]

Other fields

• The calendar years 275 AD and 275 BC.
• In the French Republican calendar, The year 275 would be a year 10 cycle and be in 2065. ^[9]
• 275 is the number of several highways in Canada, India, Japan, and the United States
• 275 Sapientia is an asteroid in the asteroid belt. It is a C-type asteroid that was discovered by Johann Palisa. ^[10]

References

1. "Composite numbers". mathworld.wolfram.com.
2. "Partition information". mathworld.wolfram.com.
3. Sloane, N. J. A. (ed.). "SequenceA000096". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
4. (sequence A321487 in the OEIS )
5. "275 streak of best selling app in the itunes store". www.guinnessworldrecords.com.
6. "275 people dressed as mobile phones". www.guinnessworldrecords.com.
7. "275 person welding lesson". www.guinnessworldrecords.com.
8. "275 certificates by a show dog". www.guinnessworldrecords.com.
9. "French Republican Calendar Guide" (PDF). broadcast.lds.org.
10. "275 Sapentia information". www.spacereference.org.