518
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 912
- Proper Divisor Sum (Aliquot Sum)
- 394
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- yes
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 216
- Möbius Function
- -1
- Radical
- 518
- 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
- 123
- Smith 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
Names
- German
- fünfhundertachtzehn· ordinal: fünfhundertachtzehnste
- English
- five hundred eighteen· ordinal: five hundred eighteenth
- Spanish
- quinientos dieciocho· ordinal: 518º
- French
- cinq cent dix-huit· ordinal: cinq cent dix-huitième
- Italian
- cinquecentodiciotto· ordinal: 518º
- Latin
- quingenti duodeviginti· ordinal: 518.
- Portuguese
- quinhentos e dezoito· ordinal: 518º
Appears in sequences
- Number of ways of making change for n cents using coins of 1, 2, 5, 10 cents.at n=59A000008
- Number of 3-edge-connected rooted cubic maps with 2n nodes and a distinguished Hamiltonian cycle.at n=5A000264
- Moran numbers: k such that k/(sum of digits of k) is prime.at n=39A001101
- Expansion of 1/(1-x)^2/(1-x^2)/(1-x^4)/(1-x^10)/(1-x^20).at n=23A001307
- Number of (2n+1)-step self-avoiding walks on diamond lattice ending at point with x = 1.at n=3A001395
- Expansion of k/(4*q^(1/2)) in powers of q, where k defined by sqrt(k) = theta_2(0, q)/theta_3(0, q).at n=6A001938
- Number of partitions of floor(5n/2)-1 into n nonnegative integers each no more than 5.at n=15A001976
- Number of points on y^2 + xy = x^3 + x^2 + x over GF(2^n).at n=8A002248
- Numbers k such that 39*2^k + 1 is prime.at n=23A002269
- Numbers that are the sum of 8 positive 4th powers.at n=50A003342
- Numbers that are the sum of 3 positive 5th powers.at n=8A003348
- Numbers that are the sum of 10 positive 7th powers.at n=4A003377
- Numbers that are the sum of 8 nonzero 8th powers.at n=2A003386
- Numbers that are the sum of 7 positive 9th powers.at n=1A003396
- Numbers that are the sum of at most 3 positive 5th powers.at n=18A004843
- Numbers that are the sum of at most 4 positive 5th powers.at n=28A004844
- Numbers that are the sum of at most 5 positive 5th powers.at n=40A004845
- Numbers that are the sum of at most 10 positive 7th powers.at n=44A004872
- Numbers that are the sum of at most 11 positive 7th powers.at n=48A004873
- Numbers that are the sum of at most 12 positive 7th powers.at n=52A004874