One hundred sixty-five million, twenty-three thousand, nine hundred twelve.
The answer depends on the degree of rounding required.
It is 165000000.
It is 200000000.
2,000,000,000
165024000
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.