It is: 2,500,000
2,500,000 two and a half million
two and a half million
2,500,000
2,500,000 two million, five hundred thousand
2,002,000
Two million, two hundred and ninety thousand.
25000
2,500,000 = two and a half million
2,500,000
Two million, five hundred thousand.
To write 22,500,000 in words, you would say "twenty-two million five hundred thousand." This follows the standard naming convention for large numbers, where each group of three digits is named in terms of the power of ten it represents.
670,000