229
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 230
- Proper Divisor Sum (Aliquot Sum)
- 1
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 228
- Möbius Function
- -1
- Radical
- 229
- Omega Function (Ω)
- 1
- Little Omega Function (ω)
- 1
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 34
- Smith Number
- no
Primality
- Prime
- yes
- Composite Number
- no
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- yes
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 50
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Names
- German
- zweihundertneunundzwanzig· ordinal: zweihundertneunundzwanzigste
- English
- two hundred twenty-nine· ordinal: two hundred twenty-ninth
- Spanish
- doscientos veintinueve· ordinal: 229º
- French
- deux cent vingt-neuf· ordinal: deux cent vingt-neufième
- Italian
- duecentoventinove· ordinal: 229º
- Latin
- ducenti viginti novem· ordinal: 229.
- Portuguese
- duzentos e vinte e nove· ordinal: 229º
Appears in sequences
- Number of nonnegative solutions to x^2 + y^2 + z^2 <= n.at n=46A000606
- Number of nonnegative solutions to x^2 + y^2 + z^2 <= n.at n=47A000606
- Number of carbon (rooted) trees with n carbon atoms = unordered 4-tuples of ternary trees.at n=9A000678
- Boustrophedon transform (first version) of Fibonacci numbers 0,1,1,2,3,5,...at n=6A000687
- Related to population of numbers of form x^2 + y^2.at n=9A000709
- Number of cyclic permutations of [n] with no i -> i+1 (mod n).at n=7A000757
- Primes p of the form 3k+1 such that Sum_{x=1..p} cos(2*Pi*x^3/p) > sqrt(p).at n=11A000921
- Dimension of the n-th graded piece of the mod-2 Steenrod algebra A_2.at n=59A000929
- n! never ends in this many 0's.at n=44A000966
- Union of all numbers {p, q} where p and q are both primes or powers of primes and q = p+2.at n=46A001092
- Twin primes.at n=30A001097
- Primes with 6 as smallest primitive root.at n=3A001125
- Primes p such that the multiplicative order of 2 modulo p is (p-1)/3.at n=3A001133
- a(n) = floor(n*log((14/11)*n^(10/9))).at n=49A001195
- Smallest k such that the product of q/(q-1) over the primes from prime(n) to prime(n+k-1) is greater than 2.at n=11A001276
- Number of combinatorial configurations of type (n_3).at n=11A001403
- Full reptend primes: primes with primitive root 10.at n=18A001913
- a(n+6) = -a(n+5) + a(n+4) + 3a(n+3) + a(n+2) - a(n+1) - a(n). a(n) = sign(n) if abs(n)<=3.at n=19A001945
- v-pile numbers of the 3-Wythoff game with i=1.at n=53A001958
- v-pile positions of the 4-Wythoff game with i=3.at n=43A001968