0055

0055 is the decimal representation of the integer 55 with leading zeros. In common usage it functions as an identifier or code in systems that require fixed-width numeric fields or strings. When treated as a number, 0055 equals 55.

In mathematics, 55 is a composite number, equal to 5 × 11. It is the tenth triangular number and a Fibonacci number (F10). It is odd, squarefree, and the product of two distinct primes. Its divisors are 1, 5, 11, and 55.

In different numeral systems, 55 has representations such as octal 055 (which equals decimal 45), decimal 55, and hexadecimal 0x37. In binary, 55 is 110111. The leading zeros in 0055 do not change its value in decimal contexts but may indicate octal formatting in some programming languages.

Science and astronomy: Element with atomic number 55 is cesium (Cs). In astronomy, Messier 55 is a globular cluster in Sagitta, and NGC 55 is a dwarf barred spiral galaxy in Sculptor.

Telecommunications: the country calling code for Brazil is 55; in many dialing plans, callers may enter 0055 when dialing Brazil from locations that use 00 as international prefix. In computing, ASCII code 55 corresponds to the character '7'.