15534
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 33696
- Proper Divisor Sum (Aliquot Sum)
- 18162
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5172
- Möbius Function
- 0
- Radical
- 5178
- Omega Function (Ω)
- 4
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 53
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- Number of 6-ary rooted trees with n nodes and height at most 6.at n=14A036623
- Interprimes which are of the form s*prime, s=18.at n=30A075293
- Records in A091579.at n=9A091587
- A sequence generated from a semi-magic square.at n=5A094943
- The bisection A053445(2n+1).at n=28A161921
- Triangle, read by rows, that transforms diagonals in the table of coefficients of successive iterations of x+x^2+x^3 (cf. A166880).at n=50A166884
- Values in A091579 that need to be smoothed in order to produce A091588.at n=8A217590
- Number of bits set to 1 in the binary representation of the n-th term of the Lucas-Lehmer sequence (A003010).at n=14A227616
- Numbers n such that n^3+prime(n) and n^3-prime(n) are prime.at n=36A257788
- Triangle read by rows T(n,k): number of undirected cycles of length k in the n-antiprism graph (n = 3...; k = 3..2n).at n=66A296542
- Number of separable partitions of n in which the number of distinct (repeatable) parts is > 1.at n=36A325716
- Number of compositions (ordered partitions) of n into distinct prime powers (1 excluded).at n=40A331847
- Number of nonnegative solutions to (x_1)^2 + (x_2)^2 + ... + (x_6)^2 <= n.at n=43A341401