5230
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 10
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 9432
- Proper Divisor Sum (Aliquot Sum)
- 4202
- 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
- 2088
- Möbius Function
- -1
- Radical
- 5230
- Omega Function (Ω)
- 3
- 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
- 178
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- yes
- Odd
- no
Appears in sequences
- Expansion of 1/(1-x^6-x^7-x^8-x^9-x^10-x^11-x^12-x^13-x^14).at n=45A017854
- Powers of fifth root of 7 rounded up.at n=22A018134
- Numbers k such that the continued fraction for sqrt(k) has period 62.at n=17A020401
- Convolution of Lucas numbers and A001950.at n=11A023622
- Expansion of 1/((1-3x)(1-6x)(1-7x)(1-9x)).at n=3A028075
- Number of nonempty subsets of {1,2,...,n} in which exactly 5/6 of the elements are <= n/3.at n=29A048002
- Number of nonempty subsets of {1,2,...,n} in which exactly 5/6 of the elements are <= (n+1)/3.at n=29A048048
- Number of nonempty subsets of {1,2,...,n} in which exactly 5/6 of the elements are <= (n+2)/3.at n=29A048081
- Number of Dyck paths of length 2n with nondecreasing peaks.at n=11A048285
- Composite numbers k such that all prime factors of k are a substring of k.at n=43A050694
- Numbers that contain as proper substrings every maximal prime power dividing them.at n=4A059401
- Non-balanced numbers in A015765.at n=22A074868
- Numbers m such that there are an equal number of numbers <= m that are contained and that are not contained in the concatenation of terms <= m in A048991.at n=3A105391
- Start with 1 and repeatedly reverse the digits and add 57 to get the next term.at n=21A118153
- Start with 1 and repeatedly reverse the digits and add 57 to get the next term.at n=33A118153
- Start with 1 and repeatedly reverse the digits and add 57 to get the next term.at n=9A118153
- Start with 1 and repeatedly reverse the digits and add 57 to get the next term.at n=45A118153
- a(n) = sum of n successive primes after the n-th prime.at n=27A131740
- Let P(A) be the power set of an n-element set A. Then a(n) = the number of pairs of elements {x,y} of P(A) for which either 0) x and y are disjoint and for which either x is a subset of y or y is a subset of x, or 1) x and y are intersecting but for which x is not a subset of y and y is not a subset of x.at n=7A134018
- Numbers A141427(k) such that the three numbers A141427(k) -/+ 3 and A141427(k) + 1 are all prime.at n=40A144206