Answer :
The correct word form is One hundred fifty-seven million nine thousand two hundred thirty-seven.
Start from the leftmost digit and group the number into sets of three digits.
The leftmost group is "157", which corresponds to "one hundred fifty-seven million".
Moving to the next group of three digits, "009" is read as "nine thousand".
The last group, "237", is read as "two hundred thirty-seven".
Combine the readings of each group with appropriate placeholders ("million" between the first and second groups, and "thousand" between the second and third groups) to get the final word form.
