11651
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 11904
- Proper Divisor Sum (Aliquot Sum)
- 253
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 11400
- Möbius Function
- 1
- Radical
- 11651
- 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
- 50
- 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
- Molien series for A_9.at n=39A008632
- Positive numbers k such that k and 5*k are anagrams in base 8 (written in base 8).at n=6A023076
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 27 ones.at n=3A031795
- a(n) is the number k, 2^n < k < 2^(n+1), such that k/c(k) is a minimum in the interval, where c(k) is Hofstadter-Conway sequence A004001.at n=12A051284
- Number of rooted trees with n nodes and 3 leaves.at n=25A055278
- Values of n for which the decimal number 10...030...01 is an n-digit prime.at n=18A100028
- Integers k such that 10^k + 63 is a prime number.at n=21A135115
- Number of Section I primes between 2^n and 2^(n+1). See A135832.at n=39A135833
- Similar to A072921 but starting with 2.at n=43A152231
- Number of lattice paths from (0,0) to (n,n) using steps (0,1), (1,0), (1,1), (2,2).at n=6A191649
- Semiprimes of the form (2^k - m)*(m*2^k - 1).at n=15A239038
- Absolute discriminants of complex quadratic fields with 3-class rank 2.at n=8A242862
- Number of matchings in the n-helm graph.at n=9A286814
- Number of integer partitions of n whose product is a perfect power.at n=47A320322
- a(n) = Sum_{k=0..n} binomial(n+k+1,n-k) * Fibonacci(k+1).at n=8A389933