The answer will depend on the degree to which the number is rounded. Without any indication of that, it is not possible to answer the question sensibly.
There are 1609.344 metres in one mile. Therefore, rounded to two decimal places, 2431 metres is equal to 2431/1609.344 = 1.51 miles.
2431 221,11 17,13,11
2431-187 = 2244
The LCM of 11, 13, and 17 is 2431
factors are 1, 2431
The positive integer factors of 2431 are: 1, 11, 13, 17, 143, 187, 221, 2431
The greatest common factor of 390 and 2431= =13
2431
yes
3669
2431
2431