2270
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
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 4104
- Proper Divisor Sum (Aliquot Sum)
- 1834
- 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
- 904
- Möbius Function
- -1
- Radical
- 2270
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 63
- 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)^2*(1-x^2)*(1-x^5)).at n=47A001304
- Convolution inverse of A143348.at n=9A002039
- Number of points on surface of tricapped prism: a(n) = 7*n^2 + 2 for n > 0, a(0)=1.at n=18A005919
- Coordination sequence T2 for Zeolite Code AST.at n=36A008037
- Coordination sequence T2 for Zeolite Code BIK.at n=29A008048
- Coordination sequence T1 for Zeolite Code LOS.at n=33A008132
- Coordination sequence T2 for Zeolite Code MAZ.at n=33A008145
- Coordination sequence T2 for feldspar.at n=32A008255
- Expansion of (1+x^7)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)).at n=53A008768
- Coordination sequence for CaF2(1), F position.at n=16A009924
- a(0) = 1, a(n) = 28*n^2 + 2 for n>0.at n=9A010018
- a(n) = Sum_{j=1..n} j*prime(j).at n=12A014285
- Powers of sqrt(22) rounded down.at n=5A017970
- Powers of sqrt(22) rounded to nearest integer.at n=5A017971
- Powers of fourth root of 22 rounded down.at n=10A018108
- Powers of fourth root of 22 rounded to nearest integer.at n=10A018109
- Coordination sequence T5 for Zeolite Code CGF.at n=33A019455
- Numbers k such that Fibonacci(k) == -55 (mod k).at n=39A023170
- [ Sum (s(j) - s(i))^2 ], 1 <= i < j <= n, where s(k) = 1 + 1/2 + ... + 1/k.at n=55A025216
- a(n) = Sum_{k=0..floor(n/2)} A026626(n-k, k).at n=16A026636