51000

51000 is a natural number that follows 50999 and precedes 51001. In mathematics, it is an even, composite number with prime factorization 2^3 × 3 × 5^3 × 17. It is divisible by 2, 3, 5 and many other divisors. Represented in different numeral systems, 51000 equals 51 × 1000 in decimal form, is 1100011100111000 in binary, and 0xC738 in hexadecimal. In scientific notation, it is 5.1 × 10^4.

Geographically, 51000 is the postal code for Châlons-en-Champagne, a commune in the Marne department in the Grand Est region of northeastern France. The 51000 postal area covers the city and surrounding communities. Châlons-en-Champagne has historical roots dating back to Roman times and features architectural heritage from the medieval and early modern periods, reflecting its long-standing role as a regional center in the Champagne area.

As a numeric value, 51000 is used in various practical contexts such as counts, measurements, and identifiers, and can serve as a convenient example of a five-digit integer in educational materials. While primarily known as a number, its recognition in postal services highlights how numeric codes can function as geographic identifiers in modern infrastructure.