16202
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 24306
- Proper Divisor Sum (Aliquot Sum)
- 8104
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 8100
- Möbius Function
- 1
- Radical
- 16202
- 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
- 159
- 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
- yes
- Odd
- no
Appears in sequences
- Coordination sequence for body-centered tetragonal lattice.at n=45A008527
- a(0) = 1, a(n) = 18*n^2 + 2 for n>0.at n=30A010008
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (natural numbers), t = A000201 (lower Wythoff sequence).at n=47A024863
- A007318 * [1, 1, -1, 1, 1, 1, ...].at n=14A142974
- Number of four-prime Carmichael numbers less than 10^n.at n=16A174612
- Number of tilings of an 8 X n rectangle using integer-sided square tiles of area > 1.at n=29A226372
- Triangle T(n,k): the number of binary sequences of n zeros and n ones in which the longest run is of length k.at n=39A229756
- a(n) = A115004(n) - A334701(n).at n=21A335179
- Expansion of 1/((1 - x^3 - x^4)^2 - 4*x^7).at n=27A376724
- Number of ways to tile a hexagonal strip made up of n equilateral triangles, using triangles, diamonds, and trapezoids.at n=15A385868