15320
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 34560
- Proper Divisor Sum (Aliquot Sum)
- 19240
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 6112
- Möbius Function
- 0
- Radical
- 3830
- Omega Function (Ω)
- 5
- 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
- 177
- 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 protruded partitions of n with largest part at most 2.at n=17A005403
- Base 9 digits are, in order, the first n terms of the periodic sequence with initial period 2,3,0,1.at n=4A037749
- Let R_{k}(m) = the digit reversal of m in base k (R_{k}(m) is written in base 10). Sequence gives numbers m such that m = Sum_{d|m, d>1} R_{d}(m).at n=6A092122
- Numbers k such that 2^(2*k+1) + 2^k + 1 is prime.at n=38A105180
- Numbers n such that n!8-1 is prime.at n=54A204662
- Base-5 analog of A208059.at n=37A212994
- Number of primes <= n-th Lucas number.at n=25A277062
- Numbers k such that Bernoulli number B_{k} has denominator 13530.at n=9A295587
- Number of integer partitions of n whose maximum multiplicity is one greater than their minimum multiplicity.at n=48A325279
- Number of subsets of {1..n} containing no sums or products of pairs of elements.at n=22A326495