233 is a Fibonacci Number if it is in the Fibonacci Sequence.

The Fibonacci Sequence starts with 1, 1, followed by the sum of the last two numbers in the sequence.

When we look at the Fibonacci Sequence, we see that the two Fibonacci Numbers before 233 are 89 and 144.

Since the sum of the last two numbers in the Sequence equals 233, we know that 233 is a Fibonacci Number.

Based on the information above, you can also calculate and conclude that the Fibonacci Number following 233 in the Fibonacci Sequence is 377, because 233 + 144 = 377.

**Fibonacci Numbers**

Look up another number to see if it is a Fibonacci Number.

Is 234 a Fibonacci Number?

Now you know if 233 is a Fibonacci Number or not. Go here to see if the next number on our list is a Fibonacci Number.

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