11231
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
- 4
- Divisor Sum
- 12264
- Proper Divisor Sum (Aliquot Sum)
- 1033
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 10200
- Möbius Function
- 1
- Radical
- 11231
- 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
- 68
- 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
- Number of symmetrical planar partitions of n (planar partitions (A000219) that when regarded as 3-D objects have just one symmetry plane).at n=34A000784
- a(n) = smallest number with shortest addition chain of length n.at n=18A003064
- Number of ways in which n identical balls can be distributed among 4 boxes in a row such that each pair of adjacent boxes contains at least 4 balls.at n=32A005337
- a(n) = least number not of form [ (a^2+b^2)/n ].at n=29A036574
- Numbers which, when expressed as a sum of distinct primes with maximum product, use a non-maximal number of primes.at n=44A053020
- Numbers k such that sigma(phi(sigma(k))) = phi(k).at n=11A066465
- 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=32A071159
- Sum of terms in n-th group in A075352.at n=45A075356
- Number of partitions of n^2 into squares not less than n.at n=39A093116
- Quaternary emirpimes.at n=31A114015
- Number of partitions of n into parts relatively prime to 63 and not == 2 (mod 4).at n=52A119952
- a(n) = prime(n)*prime(n+1) + prime(n) + prime(n+1).at n=26A126199
- A triangular sequence based on a further generalization of the Cornelius-Schultz matrix polynomials to two sequences in i and j. a(n)=(n-1)!/f[n]: f[n]-> Fibonacci numbers; c(n)=1/n; B(i,j)=(-1)^(i + j)*a[j + 1]*c[i + 1]/(j!*(i - j)!) as a lower triangular matrix.at n=25A135256
- Numbers k such that k and k^2 use only the digits 1, 2, 3, 5 and 6.at n=38A136974
- a(n) = 288*n - 1.at n=38A157997
- a(n) = 78*n^2 - 1.at n=11A158771
- Row sums of triangle A179901.at n=20A179902
- Numbers of rank 10 in the poset of lunar numbers.at n=39A191752
- Triangle read by rows: the n-th row has length A000110(n) and contains all set partitions of an n-set in canonical order.at n=34A193023
- Numbers whose product of digits is 6.at n=35A199988