3431
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3552
- Proper Divisor Sum (Aliquot Sum)
- 121
- 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
- 3312
- Möbius Function
- 1
- Radical
- 3431
- 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
- 118
- 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
- The limiting sequence [A259095(r(r+1)/2-s,r), s=0,1,2,...,r-1] for very large r.at n=31A005576
- Number of non-Abelian metacyclic groups of order 2^n.at n=50A007982
- 6-dimensional centered tetrahedral numbers.at n=7A008500
- Central binomial coefficient - 1.at n=14A014495
- Expansion of 1/(1-x^6-x^7-x^8-x^9-x^10-x^11-x^12).at n=45A017852
- n written in fractional base 5/3.at n=31A024633
- Number of partitions of n into an odd number of parts.at n=31A027193
- Clog sequence in base 2. Right to left concatenation of n,int(log_2(n)),int(log_2(int(log_2(n)))),... in base 2.at n=38A028423
- Number of combinations of n things from 1 to n at a time, with repeats allowed.at n=6A030662
- 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 57.at n=19A031555
- a(n) = Sum_{k=0..n} binomial(n,k) * binomial(Fibonacci(k)+1,2).at n=8A033190
- a(n) = (2*n - 1)*(3*n + 1).at n=24A033569
- Number of binary [ n,3 ] codes without 0 columns.at n=22A034344
- Multiplicity of highest weight (or singular) vectors associated with character chi_33 of Monster module.at n=34A034421
- Zeckendorf expansion of n: repeatedly subtract the largest Fibonacci number you can until nothing remains. Big-endian concatenation of decimals.at n=38A035514
- Number of partitions of n with equal nonzero number of parts congruent to each of 3 and 4 (mod 5).at n=38A035571
- Coordination sequence T16 for Zeolite Code STT.at n=39A038425
- Coordination sequence T6 for Zeolite Code SFF.at n=39A038432
- Coordination sequence T2 for Zeolite Code STF.at n=39A038441
- Denominators of continued fraction convergents to sqrt(817).at n=9A042577