0159

0159 is a numeric string that can refer to different things depending on context. When read as a decimal value, it represents the number 159. The leading zero is often used for padding in fixed-width formats or as part of identifiers in datasets or cataloging schemes.

In mathematics, 159 is an odd composite number with prime factorization 3 × 53. Its representations in common bases are: binary 10011111, octal 237, and hexadecimal 9F. In Roman numerals, 159 is written as CLIX.

Calendar and date usage: the 159th day of a common (non-leap) year falls on June 8; in a leap year it falls on June 7. This kind of ordinal dating is used in fields such as meteorology and agriculture to refer to specific days without repeating month names.

Astronomy: 159 Aemilia is a main-belt asteroid. As a numbered minor planet, it carries the designation 159 Aemilia, reflecting its sequential discovery and cataloging.

Computing and identifiers: in some programming languages, a leading zero on a numeric literal indicates octal notation. Since 9 is not a valid octal digit, 0159 is not a valid octal literal in languages that enforce octal syntax. Outside of literals, "0159" may simply serve as a string or an identifier in databases, part numbers, or product codes.

See also: the number 159, the asteroid 159 Aemilia, and numeral representations across bases.