16163
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 18480
- Proper Divisor Sum (Aliquot Sum)
- 2317
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 13848
- Möbius Function
- 1
- Radical
- 16163
- 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
- 146
- 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
- A hierarchical sequence (S(W2{3}c) - see A059126).at n=8A059135
- Expansion of g.f. (1 + x + 2*x^2)/((1 - x)^3*(1 - x^3)).at n=40A092498
- Second differences of sequence A160644.at n=40A160648
- Principal diagonal of the convolution array A213822.at n=13A213823
- Numbers k such that 12*k+1, 24*k+1, 36*k+1 and 72*k+1 are all prime.at n=42A255218
- Number of nX5 0..1 arrays with every element equal to 0, 1, 2, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=7A299945
- First differences of A324787: distances in A022837 from n-th low point to the next.at n=9A324789
- a(n) = Sum_{p | A055204(n)} 2^(pi(p) - 1).at n=44A336510
- The distinct values, in order of appearance, of A381087.at n=12A378138
- The smallest positive integer that produces a product that contains the digit 2 when multiplied by 2 a total of n times.at n=16A381087
- The smallest positive integer that produces a product that contains the digit 2 when multiplied by 2 a total of n times.at n=17A381087
- The smallest positive integer that produces a product that contains the digit 2 when multiplied by 2 a total of n times.at n=18A381087
- a(n) = the smallest positive integer that produces a product that contains the digit 2 when multiplied by 2 at most n times, and where a further multiplication by 2 produces a number that does not contain the digit 2. Set a(n) = -1 if no such number exists.at n=18A381183