511
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 7
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 592
- Proper Divisor Sum (Aliquot Sum)
- 81
- 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
- 432
- Möbius Function
- 1
- Radical
- 511
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
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
- 61
- Smith Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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
- no
- Odd
- yes
Names
- German
- fünfhundertelf· ordinal: fünfhundertelfste
- English
- five hundred eleven· ordinal: five hundred eleventh
- Spanish
- quinientos once· ordinal: 511º
- French
- cinq cent onze· ordinal: cinq cent onzième
- Italian
- cinquecentoundici· ordinal: 511º
- Latin
- quingenti undecim· ordinal: 511.
- Portuguese
- quinhentos e onze· ordinal: 511º
Appears in sequences
- Number of partitions into non-integral powers.at n=10A000135
- a(n) = 2^n - 1. (Sometimes called Mersenne numbers, although that name is usually reserved for A001348.)at n=9A000225
- Numbers k such that (1,k) is "good".at n=12A000696
- Moran numbers: k such that k/(sum of digits of k) is prime.at n=37A001101
- Number of ways of making change for n cents using coins of 1, 2, 4, 12, 24, 48, 96, 120 cents (based on English coinage of 1939).at n=52A001364
- Number of ways of making change for n cents using coins of 1, 2, 4, 12, 24, 48, 96, 120 cents (based on English coinage of 1939).at n=53A001364
- Expansion of 1/(1-x)^2/(1-x^2)/(1-x^6)/(1-x^12)/(1-x^24)/(1-x^48)/(1-x^60).at n=26A001365
- Number of partitions of n into at most 4 parts.at n=37A001400
- Number of series-reduced rooted trees with n nodes.at n=14A001679
- Generalized Stirling numbers, [n+2,n]_2.at n=6A001701
- Generalized Stirling numbers, [n+7,7]_2.at n=2A001709
- Convolved Fibonacci numbers.at n=5A001873
- Smallest number with reciprocal of period length n in decimal (base 10).at n=24A003060
- Divisors of 2^18 - 1.at n=15A003528
- Divisors of 2^27 - 1.at n=3A003535
- Divisors of 2^36 - 1.at n=43A003543
- Divisors of 2^45 - 1.at n=6A003550
- Degrees of irreducible representations of group L3(8).at n=34A003898
- Degrees of irreducible representations of group L3(8).at n=33A003898
- Degrees of irreducible representations of group L3(8).at n=32A003898