- 666, 4444, and 999999. All
repdigits are
palindromic numbers and are
multiples of repunits.
Other well-known
repdigits include the
repunit primes and...
-
Repdigits are a
generalization of repunits; they are
integers represented by
repeated instances of the same digit. For example, 333 is a
repdigit. The...
- four-digit
numbers for
which Kaprekar's
routine does not
reach 6174 are
repdigits such as 1111,
which give the
result 0000
after a
single iteration. All...
-
whose all
permutations are
composites but they are not
multiples of 3,
repdigits or
numbers which only have
digits 0, 2, 4, 5, 6 and 8, even excluding...
-
pandigital number in base 8. 2,178,309 =
Fibonacci number 2,222,222 =
repdigit 2,266,502 =
number of
signed trees with 13
nodes 2,274,205 = the number...
- 0.027. A
palindromic number in
bases 10, 14 (51514), and 36 (RR36). A
repdigit in
bases 10 and 36. The
largest number in
English not
containing the letter...
- = 1-automorphic
number 214,358,881 = 146412 = 1214 = 118 222,222,222 =
repdigit 222,222,227 = safe
prime 223,092,870 = the
product of the
first nine prime...
-
eleventh primorial 208,023,278,209 = 28th
Motzkin number. 222,222,222,222 =
repdigit 225,851,433,717 = 56th
Fibonacci number. 247,489,226,192 =
number of centered...
- 26-sided
polygon is
called an icosihexagon. φ(26) = φ(σ(26)). Twenty-six is a
repdigit in
bases three (2223) and
twelve (2212). In base ten, 26 is the smallest...
- 37,
therefore all
triplets (numbers like 222 or 777) in base ten are
repdigits of the form 3 n × 37 {\displaystyle 3n\times 37} . As a repunit, it also...
