2831

2831 is a positive integer. In number theory, it is the product of two prime numbers, 19 and 149, which makes it a semiprime. It is odd and square-free.

From decimal notation, 2831 equals itself; in hexadecimal it is 0x0B0F, and in binary it is 101100001111. In Roman numerals it is written as MMDCCCXXXI.

As a calendar year, 2831 CE would fall in the distant future, and there are no widely noted historical events attributed specifically to that year in standard reference works.

In practical terms, 2831 is sometimes used as an example of semiprime numbers in mathematical education, and as a test case for algorithms that factor integers.