This is the 5339th most frequent Chinese word.
五十四
Fifty-four.
In this sentence, '五十四' serves as a numeral indicating the specific quantity of books owned.
我有五十四本书。
I have fifty-four books.
Here, '五十四' is used to represent the number itself as a subject in the sentence.
五十四是一个偶数。
Fifty-four is an even number.
In this context, '五十四' denotes the specific count of students taking part in the event.