Cube Root of 217

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Cube root of

What is the cube root of 217?

Answer

∛217 ≈
6.0092

Real cube root: the only number whose cube is 217.

≈ — rounded to 4 decimal places. 217 is not the cube of a rational number, so ∛217 is irrational: its decimal expansion never ends and never repeats.

Prime factors
217 = 7 × 31
Take out of the root
No prime appears three times, so ∛217 is already in simplest form.
Between cubes
6³ = 216 < 217 < 343 = 7³, so 6 < ∛217 < 7 and ∛217 ≈ 6.0092

See Also

FAQ

What is the cube root of 217?

∛217 ≈ 6.0092

Can ∛217 be simplified?

No: no prime appears three times in 217, so its only cube factor is 1 and ∛217 is already in simplest form. Since 6³ = 216 < 217 < 343 = 7³, ∛217 lies between 6 and 7: ∛217 ≈ 6.0092.

Is ∛217 a rational number?

No: 217 is not the cube of a rational number, and the cube root of a fraction p/q in lowest terms is rational only when p and q are both cubes. So ∛217 is irrational; its decimal never ends and never repeats: ∛217 ≈ 6.0092.