11222
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 8
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 17472
- Proper Divisor Sum (Aliquot Sum)
- 6250
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5400
- Möbius Function
- -1
- Radical
- 11222
- 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
- 161
- 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) = floor(3^n / 2^n).at n=23A002379
- Expansion of 1 / ((1-x)^2*(1-x^2)*(1-x^3)*(1-x^4)).at n=45A002621
- Numbers that contain only 1's and 2's. Nonempty binary strings of length n in lexicographic order.at n=37A007931
- [ sqrt(3/2)^n ].at n=46A014215
- a(n) = position of n^3 + 9 in A003072.at n=46A024971
- Positive numbers for which the sum of digits equals the product of digits.at n=32A034710
- Numbers having three 2's in base 10.at n=37A043499
- Append d digits d after each digit d in decimal expansion of n.at n=12A048377
- Number of unlabeled directed graphs with n arcs and no isolated vertices.at n=7A053418
- Coefficients of monic irreducible polynomials over GF(3) listed in lexicographic order.at n=25A058944
- Coefficients of monic primitive irreducible polynomials over GF(3) listed in lexicographic order.at n=11A058949
- Coefficients of monic primitive irreducible polynomials over GF(4) listed in lexicographic order.at n=33A058952
- Numbers in Morse code, with 1 for a dot, 2 for a dash and 0 between digits/letters.at n=2A060109
- Smallest positive number formed by a set of digits whose product = sum of the digits.at n=14A061672
- Integers m such that (x1*x2*..xk)^(x1+x2+..xk) = (x1+x2+..xk)^(x1*x2*..xk) where x1x2..xk are the digits of m in base 10.at n=35A064158
- Coefficients of irreducible polynomials over GF(3) listed in lexicographic order.at n=28A065020
- String formed from first n ternary digits found in decimal expansion of Pi.at n=4A065834
- Nonprimes whose sum of digits is equal to its product of digits.at n=25A066307
- Values of floor((3/2)^n) that are composite.at n=13A070758
- Integers whose decimal expansion start with 1, do not contain zeros and each successive digit to the right is at most one greater than the previous digit.at n=30A071159