2558

2558 is a natural number that follows 2557 and precedes 2559. In base-10 notation it is written as 2558 and is an even number.

In mathematics, 2558 factors as 2 × 1279, with 1279 being a prime number. The sum of its digits is 20. In binary, 2558 is 100111111110, and in hexadecimal it is 0x9FE.

In calendar usage, 2558 BE (Buddhist Era) corresponds to 2015 CE in the Gregorian calendar, since the Buddhist Era is roughly 543 years ahead of the Gregorian timeline. The BE system is widely used in Thailand, Cambodia, Laos, and other regions that follow Buddhist calendars for civil year numbering. Thus, the year 2558 BE is commonly encountered in Southeast Asian contexts as the year 2015 CE.

Beyond calendar labeling, 2558 serves as a four-digit identifier in numerical contexts and appears in various counting or labeling schemes where a year-like value is needed. It is not associated with a single, globally significant historical event by itself; its primary distinctions arise from its properties as a number and its use in calendar systems such as the Buddhist Era.