2204
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 8
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 4200
- Proper Divisor Sum (Aliquot Sum)
- 1996
- 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
- 1008
- Möbius Function
- 0
- Radical
- 1102
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 3
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
- 45
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- Numbers k such that phi(k) = phi(k+1).at n=10A001274
- Squares written in base 8.at n=33A002441
- a(n) = floor(n*phi^9), where phi is the golden ratio, A001622.at n=29A004924
- a(n) = round(n*phi^9), where phi is the golden ratio, A001622.at n=29A004944
- Number of strict (-1)st-order maximal independent sets in cycle graph.at n=15A007390
- Coordination sequence T2 for Zeolite Code JBW.at n=31A008122
- Coordination sequence T2 for Zeolite Code STI.at n=32A008235
- Coordination sequence T1 for Milarite.at n=29A008256
- Coordination sequence T1 for Coesite.at n=25A008267
- If a, b in sequence, so is ab+4.at n=36A009303
- a(n) = a(n-1) + a(n-4), starting 1,1,1,3.at n=24A014101
- Number of lines through exactly 10 points of an n X n grid of points.at n=60A018817
- Number of 9's in all partitions of n.at n=33A024793
- a(n) = Lucas(n+2) - 3.at n=13A027961
- a(n) = n^2 - 5.at n=47A028875
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 22.at n=41A031520
- Four times second pentagonal numbers: a(n) = 2*n*(3*n+1).at n=19A033580
- Least number of Sort-then-add persistence n.at n=20A033863
- Least number of Sort-then-add persistence n.at n=20A033908
- Coordination sequence T16 for Zeolite Code STT.at n=31A038425