1331 is a perfect cube.
1331 is that smallest cube (other than 1) containing only odd digits. It is also the smallest cube having every digit it contains exactly twice
1331 = 192 + 212 + 232.
1331 = 113 = 439 + 443 + 449 is the smallest solution of three consecutive primes summing to the third power of a prime.
A partial solar eclipse occurred on July 5 in the year 1331.
Source: The Penguin Dictionary of Curious and Interesting Numbers, rev. ed., by David Wells.
1 comment:
This seems wrong:
1331 = 11^3 = (13 – 3 + 1)^3 = (1 + 3 + 3 + 1)^3.
Shouldn't it be =(1 + 3 x 3 + 1)^3?
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