5522
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 9072
- Proper Divisor Sum (Aliquot Sum)
- 3550
- 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
- 2500
- Möbius Function
- -1
- Radical
- 5522
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 3
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
- 129
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- a(n) = d(n)/2, where d = A026040.at n=29A026041
- (d(n)-r(n))/5, where d = A008778 and r is the periodic sequence with fundamental period (0,3,1,0,1).at n=51A026053
- 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 74.at n=4A031572
- Numerators of continued fraction convergents to sqrt(525).at n=4A042004
- Number of 2n-bead balanced binary strings of fundamental period 2n, rotationally equivalent to reverse.at n=11A045662
- a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, where m = n - 1 - 2^p and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), with a(1) = 1, a(2) = 2, and a(3) = 1.at n=13A049950
- Vertically symmetric numbers.at n=32A053701
- Numbers using only the digits 2 and 5, that are both curved and straight.at n=26A072961
- k such that k-th prime is of the form 2n^2 + 3n + 3.at n=25A096690
- Partial sums of A005587. Fourth column of triangle A115127.at n=9A115129
- Connell (3,5)-sum sequence (partial sums of the (3,5)-Connell sequence).at n=62A122796
- Coefficient of x^5 in (1-x-x^2)^(-n).at n=9A139798
- Binomial transform of A014217.at n=9A142586
- Eigentriangle generated from A109128, row sums = expansion of {2(exp(x)-1)}.at n=49A144061
- Number of walks within N^2 (the first quadrant of Z^2) starting and ending at (0,0) and consisting of n steps taken from {(-1, -1), (-1, 0), (0, 1), (1, 0)}.at n=11A151352
- Indices k such that 22 plus the k-th triangular number is a perfect square.at n=8A154149
- Lower bounds for minimal number of simplices in a triangulation of the n-dimensional cube (A019503).at n=5A166932
- First terms "a" of quadruples a>b>c>d>0 with six square pairwise sums.at n=7A175534
- Sigma-decagonal numbers: numbers k such that sigma(k) is a decagonal number, that is, sigma(k) = 4*m^2 - 3*m for some nonnegative integer m.at n=44A180937
- Number of 3 X n binary arrays without the pattern 0 1 diagonally, vertically, antidiagonally or horizontally.at n=32A188554