11031
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 6
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 14712
- Proper Divisor Sum (Aliquot Sum)
- 3681
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 7352
- Möbius Function
- 1
- Radical
- 11031
- 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
- 161
- 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 4-line partitions of n (i.e., planar partitions of n with at most 4 lines).at n=17A002799
- 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 35.at n=34A031533
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 35.at n=2A031713
- Numbers k such that 191*2^k+1 is prime.at n=20A032472
- Numbers k such that 7*(10^k - 1)/9 + 2*10^floor(k/2) is a palindromic wing prime (a.k.a. near-repdigit palindromic prime).at n=9A077796
- Number of permutations satisfying -k <= p(i) - i <= r and p(i) - i not in I, i=1..n, with k=1, r=4, I={0,3}.at n=29A079973
- Cyclops semiprimes.at n=33A160725
- Numbers n that (n^3 - 4,n^3 - 2) is a twin prime pair.at n=41A178507
- Counting integers normally (1, 2, 3, 4, 5...), write them as roman numerals (I, II, III, IV, V...), describe them (one 1, two 1s, three 1s, one 1 one 5, one 5...), and write them out as numbers (11, 21, 31, 1115, 15...).at n=12A180105
- Numbers n with property that there is a different number m such that the lunar squares n*n and m*m are the same.at n=18A181319
- Number of numbers <= p^2 with largest prime factor <= p, where p is the n-th prime; a(0) = 1.at n=40A184677
- Numbers that match polynomials over {0,1} that have a factor containing 3 as a coefficient; see Comments.at n=35A208181
- Number of idempotent 3 X 3 0..n matrices of rank 1.at n=39A224525
- Numbers whose sum of anti-divisors is equal to the sum of the divisors of their arithmetic derivative.at n=16A249912
- Molien series for invariants of finite Coxeter group A_9.at n=54A266778
- Number of separable partitions of n in which the number of distinct (repeatable) parts <= 4.at n=42A325713
- Number of subsets of {1..n} containing no sums or products of pairs of elements.at n=21A326495
- Main diagonal of A332372.at n=10A332373
- Partial sums of A224613.at n=37A365446
- Number of integer partitions of n whose semi-sums cover an interval of positive integers.at n=48A367402