16515
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
- 28704
- Proper Divisor Sum (Aliquot Sum)
- 12189
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 8784
- Möbius Function
- 0
- Radical
- 5505
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 190
- 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
- no
- Odd
- yes
Appears in sequences
- Numbers that are the sum of 5 positive 7th powers.at n=22A003372
- Expansion of (1-x^5) / (1-x)^5.at n=27A008487
- Positive numbers k such that k and 3*k are anagrams in base 7 (written in base 7).at n=25A023069
- The hyper-Wiener index of the nanostar dendrimer defined pictorially as G(n) in the Darafsheh et al. reference.at n=1A227706
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 475", based on the 5-celled von Neumann neighborhood.at n=27A272449
- Number of integer partitions of n whose multiplicities appear with distinct multiplicities that cover an initial interval of positive integers.at n=50A325331
- a(n) is the number of edges formed by n-secting the angles of a nonagon (enneagon).at n=27A335783
- Number of partitions of n that do not contain odd primes as parts.at n=50A355195
- Number of integer compositions of n whose leaders of strictly decreasing runs are themselves strictly decreasing.at n=27A374763