In figures it is 2,500.
In word it is 'two thousand five hundred'.
To write "two and a half thousand," you would write it as "2,500." This is the standard numerical representation for two thousand five hundred. The comma is used to separate the thousands from the hundreds, tens, and ones places in the number.
Two thousands.
20000000 two hundred million or Two hundred thousand thousand
32,000
7.082
4,200,000
56 thousands
half
Seventy two and sixteen thousands in standard form is 72.016
2,465.0015
42,204
The standard form is 200,276,012