5050

5050 is an integer in the decimal system. It equals 50 × 101 and is the 100th triangular number, since Tn = n(n+1)/2 with n = 100. Therefore it is the sum of the integers from 1 to 100. Its prime factorization is 2 × 5^2 × 101, which means its divisors include 1, 2, 5, 10, 25, 50, 101, 202, 505, 1010, 2525, and 5050.

In mathematics, 5050 is notable as a triangular number and can be expressed as the binomial coefficient C(101, 2). Its properties, such as being even and having multiple small prime factors, align with its composite structure.

In electronics and consumer lighting, 5050 commonly refers to a standard surface-mount LED package size, measuring 5.0 × 5.0 millimeters. This package is used for both white and RGB LEDs. An RGB 5050 package typically contains three diodes (red, green, and blue) in one package, making it popular for color-changing LED strips and decorative lighting. White 5050 LEDs are also common in signage, backlighting, and general illumination, often deployed in 5-volt systems.

Beyond mathematics and electronics, 5050 can appear as a product code, model number, or shorthand in informal contexts. The sequence is sometimes used to indicate a 50/50 split in casual writing, though this usage varies by culture and context.