2283
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3048
- Proper Divisor Sum (Aliquot Sum)
- 765
- 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
- 1520
- Möbius Function
- 1
- Radical
- 2283
- Omega Function (Ω)
- 2
- 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
- 58
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- 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
- no
- Odd
- yes
Appears in sequences
- Generalized Catalan numbers: a(n+1) = a(n) + Sum_{k=1..n-1} a(k)*a(n-1-k).at n=12A004148
- Coordination sequence T2 for Zeolite Code AET.at n=33A008008
- Coordination sequence T3 for Zeolite Code CAS.at n=29A008065
- Coordination sequence T3 for Zeolite Code LAU.at n=34A008126
- Coordination sequence T1 for Zeolite Code -CLO.at n=42A009850
- Smallest odd k>n such that k | n^k + n, or 0 if n=2^m.at n=39A015908
- Fibonacci sequence beginning 3, 14.at n=12A022125
- Numbers k such that Fibonacci(k) == 2 (mod k).at n=37A023174
- Essentially same as A004148.at n=13A025241
- a(n) = (1/1 + 1/2 + ... + 1/n)*lcm{1,2,...,n}.at n=7A025529
- Triangle read by rows: square of the lower triangular mean matrix.at n=28A027446
- 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 47.at n=8A031545
- Lucky numbers with size of gaps equal to 18 (lower terms).at n=15A031900
- Number of balanced signed graphs on n unlabeled nodes.at n=6A034892
- Number of asymmetric rooted polygonal cacti with bridges (mixed Husimi trees).at n=10A035353
- Limit of the position of the n-th partition into parts 5k+2 or 5k+3 in the list of all integer partitions sorted in reverse lexicographic order, for integers == 3 (mod 5).at n=39A035408
- Numbers n such that string 5,3 occurs in the base 8 representation of n but not of n-1.at n=39A044230
- Numbers n such that string 1,6 occurs in the base 9 representation of n but not of n-1.at n=31A044266
- Numbers n such that string 8,3 occurs in the base 10 representation of n but not of n-1.at n=24A044415
- Numbers n such that string 5,3 occurs in the base 8 representation of n but not of n+1.at n=39A044611