317

317 is a natural number that follows 316 and precedes 318. In mathematics it is a prime number, the 66th prime. It is odd and not divisible by 3 or 5. Its prime status means its only positive divisors are 1 and itself.

Numeral representations: in decimal it's 317; in hexadecimal it's 0x13D; in octal 0o457; in binary 1001111101. In Roman numerals it is CCCXVII.

Geographic and cultural usage: The telephone area code 317 covers central Indiana, including Indianapolis. An overlay area code 463 serves the same region to supply additional numbers.

In industry, 317 is a designation for a stainless steel grade, specifically type 317 (UNS S31700) and its low-carbon variant 317L, known for corrosion resistance in certain environments.

As a calendar year, 317 CE falls in the 4th century during the late Roman Empire.