511 (number)

511 is the natural number following 510 and preceding 512. It is a Mersenne number, being one less than a power of 2: .As a result, 511 is a palindromic number and a repdigit in bases 2 (1111111112). It is also palindromic and a repdigit in base 8 (7778). It is a generalized heptagonal number (sequence in the OEIS), since when . It is a Harshad number in bases 3, 5, 7, 10, 13 and 15.

511 (number)

511 is the natural number following 510 and preceding 512. It is a Mersenne number, being one less than a power of 2: .As a result, 511 is a palindromic number and a repdigit in bases 2 (1111111112). It is also palindromic and a repdigit in base 8 (7778). It is a generalized heptagonal number (sequence in the OEIS), since when . It is a Harshad number in bases 3, 5, 7, 10, 13 and 15.