2169

2169 is the natural number that comes after 2168 and before 2170. It is a four-digit, odd, composite integer.

The prime factorization of 2169 is 3^2 × 241, giving the divisors 1, 3, 9, 241, 723, and 2169. The sum of its digits is 18, so it is divisible by 9 and by 3, but it is not divisible by 2, 5, or 10. In Roman numerals, 2169 is MMCLXIX. In hexadecimal, it is 0x879, and in binary it is 100001111001. These representations illustrate its place within multiple numeral systems.

As a year, AD 2169 would fall in the 22nd century. It is not a leap year under the Gregorian calendar. Since it is a hypothetical future year, there are no widely documented events associated with it in mainstream historical records.