√243 = 15.5884572681. 243 is not a perfect square; the result is irrational.

Is 243 a perfect square?

No, 243 is not a perfect square. Its square root is irrational.

What is 15.5884572681 squared?

15.5884572681 squared is approximately 243. (15.5884572681)² ≈ 243

Instant answer with step-by-step solution

√243 = 15.5884572681

√243 = 15.5884572681

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

We need to find √243 — a number that when multiplied by itself equals 243.
243 is not a perfect square. Its square root is irrational.
It falls between √225 = 15 and √256 = 16.
Using the formula √N = N^(1/2): √243 = 243^0.5 = 15.5884572681
Verification: 15.5884572681 × 15.5884572681 ≈ 243 ✓ (rounded to 10 significant figures)

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