One hundred sixty-five million, twenty-three thousand, nine hundred twelve.
2,000,000,000
The answer depends on the degree of rounding required.
It is 200000000.
165024000
It is 165000000.
This cannot be correctly answered because you did not say what place to round it to.
The answer depends on the degree to which the number is rounded. To the nearest 10, it is 165023910 To the nearest trillion, it is 0.
When a number is 0, 1, 2, 3 or 4 it rounds down. When a number is 5, 6, 7, 8 or 9 it rounds up. In the case of 165023912 the hundred thousands digit is 0 so you round down. The answer is 165000000.