5543
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
- 5808
- Proper Divisor Sum (Aliquot Sum)
- 265
- 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
- 5280
- Möbius Function
- 1
- Radical
- 5543
- 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
- 204
- 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
- Numbers k such that k^4 can be written as a sum of four positive 4th powers.at n=37A003294
- Coordination sequence T2 for Zeolite Code VET.at n=45A009903
- Expansion of 1/(1-x^5-x^6-x^7-x^8).at n=48A017839
- a(n) = n*(21*n-1)/2.at n=23A022278
- [ exp(2/21)*n! ].at n=6A030850
- 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 73.at n=21A031571
- Number of partitions of n into parts not of the form 23k, 23k+9 or 23k-9. Also number of partitions with at most 8 parts of size 1 and differences between parts at distance 10 are greater than 1.at n=30A035997
- Numbers k such that k^4 can be written as a sum of four positive 4th powers with no common factor.at n=14A039664
- Number of partitions satisfying cn(2,5) + cn(3,5) <= cn(1,5) + cn(4,5).at n=31A039895
- Composite n such that sigma(n)-phi(n) divides sigma(n)+phi(n).at n=44A061367
- Semiprimes p1*p2 such that p2 > p1 and p2 mod p1 = 11.at n=20A064909
- Numbers n such that binomial(2n, n) - 1 is prime.at n=31A066726
- Nonprime numbers n such that q=phi(n)/(sigma(n)-n-1) is an integer and n is not a prime square.at n=37A070161
- Smallest integer >= 0 of the form x^3 - n^4.at n=35A070930
- Rounded total surface area of a regular octahedron with edge length n.at n=40A071396
- Sum of determinants of 2nd order principal minors of powers of inverse of the matrix ((1,1,0,0),(1,0,1,0),(1,0,0,1),(1,0,0,0)).at n=17A074453
- Numbers n such that n!! + 2^2 is prime.at n=15A076186
- Numbers k such that 10^k + 7 is prime.at n=15A088274
- If p(k) is the k-th prime, then the n-th set of 3 consecutive cousin prime pairs starts at p(a(n)).at n=17A095970
- Numbers k such that k^4 can be written as a sum of four distinct positive 4th powers.at n=37A096739