5318
domain: N
Properties
Digital Properties
- Digit Count
- 4
- 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
- 7980
- Proper Divisor Sum (Aliquot Sum)
- 2662
- 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
- 2658
- Möbius Function
- 1
- Radical
- 5318
- 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
- 54
- 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 T1 for Cordierite.at n=44A008251
- Coordination sequence T2 for Zeolite Code -CHI.at n=46A009847
- 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 72.at n=9A031570
- Numbers k such that A102489(k) is divisible by k.at n=23A032563
- Expansion of Product_{d | 48} theta_3(q^d).at n=49A033760
- Number of sets of rooted connected graphs where every block is a complete graph.at n=9A035052
- Numbers whose base-5 representation contains exactly two 2's and three 3's.at n=14A045273
- Numbers n such that 83*2^n-1 is prime.at n=29A050567
- McKay-Thompson series of class 42D for Monster.at n=44A058674
- a(n) = floor(Pi^n * e^n).at n=4A062541
- G.f. satisfies A(x) = 1 + Sum_{n>=0} (x*A(x))^(2^n).at n=10A075864
- Numbers k such that average of prime(k) and prime(k+1) is a perfect square.at n=32A076692
- Column 4 of triangle A091602.at n=36A091607
- Number of prime pairs below 10^n having a difference of 40.at n=6A093974
- Pentanacci numbers: a(n) = a(n-1) + a(n-2) + a(n-3) + a(n-4) + a(n-5), starting 1,0,0,0,1.at n=17A124313
- Half-indexed Fibonacci numbers a(n)=round(sqrt((1+sqrt(5))/2)^n/sqrt(5)) a(2n)=F(n)=A000045, so a(n)=F(n/2).at n=38A127217
- Number of partitions of n into parts that are odd or == +- 2 (mod 10).at n=37A133153
- Generalized Fibonacci numbers Fib(n + 0.5) rounded to an integer.at n=19A158510
- Number of 4-colorings of a side-n hexagonal array with colors introduced in row major order.at n=2A216790
- T(n,k)=Number of (k+1) colorings of a side-n hexagonal array with colors introduced in row major order.at n=12A216792