31
This number is a prime.
Just showing those entries submitted by 'Gupta': (Click here to show all)
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The sum of digits of the 31st Fibonacci number is 31. [Gupta]
31 is the smallest multidigit prime in the decimal expansion of cube root of 31. [Gupta]
The reverse concatenation of first two triangular numbers is prime. [Gupta]
The smallest prime that can be represented as the sum of two triangular numbers in two different ways (21 + 10 and 28 + 3). [Gupta]
The smallest multidigit self prime. [Gupta]
The 31st prime is preceded by reversal(31) consecutive composite numbers. [Gupta]
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