Square Root of 255 Simplified

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What is the square root of 255 simplified?

Answer

√255 cannot be simplified — its simplest radical form is
√255

√255 is already in simplest form — 255 has no square factor other than 1, so nothing comes out of the radical. As a decimal, √255 ≈ 15.969.

Simplifying √255 Step by Step

1. Prime factorization. — All Prime Factors of 255:

255 = 3 × 5 × 17

2. Pair up equal primes. Each pair is a perfect square and comes out of the root as one factor; a prime without a partner stays under the radical.

Prime factorTimes in 255Comes out of the rootStays under the root
31—3
51—5
171—17

3. Take the pairs out of the root.

√255 = √(3 × 5 × 17)

No prime appears twice, so there is no pair to take out.

√255

4. Check by squaring back.

The only perfect square dividing 255 is 1 = 1², and 1² × 255 = 255

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This calculator writes a square root in simplest radical form: it finds the largest perfect square that divides the number, takes its root out of the radical and leaves the rest under it. For example, it can help you find out what is the square root of 255 simplified? (The answer is: √255). Enter a whole number (e.g. '255') and hit the 'Simplify' button.
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Simplified Square Roots Table

NumberSimplest radical formDecimal value
2404√15≈ 15.492
241√241≈ 15.524
24211√2≈ 15.556
2439√3≈ 15.588
2442√61≈ 15.62
2457√5≈ 15.652
246√246≈ 15.684
247√247≈ 15.716
2482√62≈ 15.748
249√249≈ 15.78
2505√10≈ 15.811
251√251≈ 15.843
2526√7≈ 15.875
253√253≈ 15.906
254√254≈ 15.937
255√255≈ 15.969
2561616
257√257≈ 16.031
258√258≈ 16.062
259√259≈ 16.093
2602√65≈ 16.125
2613√29≈ 16.155
262√262≈ 16.186
263√263≈ 16.217
2642√66≈ 16.248
265√265≈ 16.279
266√266≈ 16.31
267√267≈ 16.34
2682√67≈ 16.371
269√269≈ 16.401

FAQ

What is the square root of 255 simplified?

√255 cannot be simplified — its simplest radical form is √255

Is 255 a perfect square?

No. 255 has no perfect square factor other than 1, so √255 cannot be simplified and stays √255.

What is √255 as a decimal?

√255 ≈ 15.969. The decimal never ends and never repeats, so it is always rounded; the exact value is √255.

What is the largest perfect square that divides 255?

Only 1. 255 has no other square factor, so √255 is already in simplest radical form.

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