**Writing the Number with Commas:**

To write the number "thirty five lakh five thousand two hundred thirteen" with commas, we need to understand the place value system. In the Indian numbering system, numbers are grouped in sets of two digits, starting from the rightmost digit. Each set is called a "lakh." The grouping continues with "crore," "arab," "kharab," etc.

Here is the step-by-step process to write the number with commas:

1. Identify the place value of each digit in the given number:
- The rightmost digit is "3" and represents ones.
- The next digit to the left is "1" and represents tens.
- The next digit to the left is "2" and represents hundreds.
- The next digit to the left is "0" and represents thousands.
- The next digit to the left is "5" and represents ten thousands.
- The next digit to the left is "2" and represents lakhs.
- The leftmost digit is "5" and represents ten lakhs.

2. Group the digits in sets of two, starting from the rightmost digit:
- The rightmost two digits are "13" (ones and tens).
- The next two digits are "02" (hundreds and thousands).
- The next two digits are "55" (ten thousands and lakhs).
- The leftmost two digits are "35" (ten lakhs).

3. Insert a comma after every two digits, starting from the right, to represent the grouping:
- The rightmost two digits are "13" (ones and tens).
- Insert a comma after "13" to get "13,".
- The next two digits are "02" (hundreds and thousands).
- Insert a comma after "02" to get "02,".
- The next two digits are "55" (ten thousands and lakhs).
- Insert a comma after "55" to get "55,".
- The leftmost two digits are "35" (ten lakhs).

4. Combine all the groups with commas to get the final representation:
- The final representation of the number "thirty five lakh five thousand two hundred thirteen" with commas is "35,55,02,13."

Therefore, the number "thirty five lakh five thousand two hundred thirteen" can be written with commas as "35,55,02,13."