Is 261 a perfect square?

No, 261 is not a perfect square. Its square root is irrational.

What is 16.1554944214 squared?

16.1554944214 squared is approximately 261. (16.1554944214)² ≈ 261

√261 = 16.1554944214. 261 is not a perfect square; the result is irrational.

Instant answer with step-by-step solution

√261 = 16.1554944214

√261 = 16.1554944214

⚠ 261 is not a perfect square — result rounded to 10 significant figures

We need to find √261 — a number that when multiplied by itself equals 261.
261 is not a perfect square. Its square root is irrational.
It falls between √256 = 16 and √289 = 17.
Using the formula √N = N^(1/2): √261 = 261^0.5 = 16.1554944214
Verification: 16.1554944214 × 16.1554944214 ≈ 261 ✓ (rounded to 10 significant figures)

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