6226
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- yes
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 10224
- Proper Divisor Sum (Aliquot Sum)
- 3998
- 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
- 2820
- Möbius Function
- -1
- Radical
- 6226
- 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
- 93
- 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
- Numbers k such that the continued fraction for sqrt(k) has period 62.at n=25A020401
- 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 78.at n=10A031576
- Palindromic Fibonacci-lucky numbers.at n=39A039674
- Base-10 palindromes that start with 6.at n=14A043041
- Numbers having four 4's in base 6.at n=21A043388
- Palindromes with exactly 3 prime factors (counted with multiplicity).at n=42A046329
- Palindromes with exactly 3 distinct prime factors.at n=27A046393
- a(n) is the smallest palindrome > a(n-1) such that a(1)+a(2)+...+a(n) is a prime.at n=21A051934
- Sum of antidiagonals of A060736.at n=22A061349
- Positive numbers whose product of digits is 9 times their sum.at n=21A062041
- Harmonic mean of digits is 3.at n=40A062181
- Palindromic numbers with even digits.at n=40A062287
- Numbers beginning and ending with their multiplicative digital root.at n=34A064704
- Concatenation of R(n) (A004086) and n, omitting leading 0's.at n=25A071273
- Total number of branches of length k (k>=1) in all ordered trees with n+k edges (it is independent of k).at n=7A073663
- Palindromic numbers which are products of an odd number of distinct primes.at n=48A075800
- Palindromic even numbers with an odd number of distinct prime factors.at n=14A075809
- Palindromic even numbers with exactly 3 prime factors (counted with multiplicity).at n=18A075816
- Palindromic even numbers with an odd number of prime factors (counted with multiplicity).at n=35A075817
- A014486-indices of binary trees whose left and right subtree are identical.at n=22A083938