5550
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
- 1
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 14136
- Proper Divisor Sum (Aliquot Sum)
- 8586
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1440
- Möbius Function
- 0
- Radical
- 1110
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 4
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
- yes
Recreational
- Happy Number
- no
- Harshad Number
- yes
- Narcissistic Number
- no
- Collatz Steps
- 67
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- a(n) = 2*n*(2*n+1).at n=37A002943
- Coordination sequence T3 for Zeolite Code VET.at n=45A009904
- Coordination sequence for CaF2(1), Ca position.at n=25A009923
- Ceiling of Gamma(n+5/12)/Gamma(5/12).at n=8A020093
- a(n) = (-1 + prime(n+1)^2)/4.at n=33A024701
- Cycle of 2 steps possible for 'concatenate a(n) and nextprime(a(n)) is a prime'.at n=37A034592
- Numbers having three 5's in base 10.at n=15A043511
- Smallest oblong (promic) number containing exactly n 5's.at n=2A048540
- Let Py(n)=A000330(n)=n-th square pyramidal number. Consider all integer triples (i,j,k), j >= k>0, with Py(i)=Py(j)+Py(k), ordered by increasing i; sequence gives j values.at n=33A053720
- Non-palindromic number and its reversal are both multiples of 15.at n=37A062914
- Dimension of the space of weight n cuspidal newforms for Gamma_1( 61 ).at n=36A063334
- Coordination sequence for ReO_3 net with respect to Re atom.at n=43A066714
- Numbers n such that phi(n+1) = 3*phi(n).at n=25A067143
- Engel expansion of sinh(1).at n=37A068377
- Smallest multiple of n using only digits 0 and 5.at n=5A078244
- Smallest multiple of n using only digits 0 and 5.at n=29A078244
- Quotient of LCM of prime(n+1)-1 and prime(n)-1 and GCD of the same two numbers.at n=34A083555
- Number of lattice points on or inside the rectangle formed by [1 <= x <= (q-1)/2] and [1 <= y <= (p-1)/2], where p = n-th prime, q = (n-1)-st prime.at n=33A087427
- Number of regions that the line segments in A091908(n) cut the equilateral triangle into.at n=43A092098
- A sequence derived from pentagonal numbers, or a Stirling number of the first kind matrix.at n=11A094952