2521

2521 is a natural number that comes after 2520 and before 2522. It is an odd integer used in counting, labeling, and various numerical contexts.

In mathematics, 2521 is a prime number, meaning its only positive divisors are 1 and itself. This makes it indivisible by any other integers besides 1 and 2521.

In different numeral systems, 2521 can be represented as binary 100111011001 and hexadecimal 0x9D9. In Roman numerals, it is written as MMDXXI.

As a calendar reference, if used as a year, 2521 CE would be in the 26th century and would occur long in the future relative to the present era. It has no widely recorded historical events tied specifically to that year in common historical summaries.

Beyond pure mathematics, 2521 often appears as a label in serial numbers, catalog entries, or product designations. Like many other four-digit numbers, it functions as a convenient placeholder or identifier in inventories, technical documents, or computerized systems.

Overall, 2521 is most notable for its status in number theory as a prime, along with its straightforward representations in binary, hexadecimal, and Roman numerals, and its use as a general numerical label in various practical contexts.