2192
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 10
- Divisor Sum
- 4278
- Proper Divisor Sum (Aliquot Sum)
- 2086
- 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
- 1088
- Möbius Function
- 0
- Radical
- 274
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 2
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
- 94
- 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
- Number of n-bead necklaces with 2 colors when turning over is not allowed; also number of output sequences from a simple n-stage cycling shift register; also number of binary irreducible polynomials whose degree divides n.at n=15A000031
- Number of monosubstituted alkanes C(n)H(2n+1)-X of the form shown in the Comments lines that are stereoisomers.at n=10A000622
- Numbers k such that (k^2 + k + 1)/19 is prime.at n=48A002643
- Numbers that are the sum of 8 positive 6th powers.at n=24A003364
- Numbers that are the sum of 6 positive 7th powers.at n=7A003373
- Numbers that are the sum of at most 6 positive 7th powers.at n=33A004868
- Numbers that are the sum of at most 7 positive 7th powers.at n=41A004869
- Numbers that are the sum of at most 8 positive 7th powers.at n=50A004870
- Number of walks on cubic lattice.at n=15A005570
- Number of vertex-transitive graphs with n nodes.at n=30A006799
- Coordination sequence T2 for Zeolite Code ERI.at n=34A008094
- Coordination sequence T4 for Zeolite Code EUO.at n=29A008099
- Expansion of e.g.f. cos(x)/cos(sinh(x)), even powers only.at n=4A009105
- Expansion of e.g.f.: exp(x)/cosh(sin(x)).at n=8A009295
- Coordination sequence T3 for Zeolite Code CON.at n=33A009870
- Coordination sequence T4 for Zeolite Code iRON.at n=33A009884
- Coordination sequence for sigma-CrFe, Position Xc.at n=12A009961
- a(n) = floor( n*(n-1)*(n-2)/10 ).at n=29A011892
- E.g.f.: arctanh(sinh(x)*exp(x)).at n=6A012521
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite RSN = RUB-17 K4Na12 [ Zn8Si28O72 ]. 18 H2O.at n=11A019222