515
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- yes
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 624
- Proper Divisor Sum (Aliquot Sum)
- 109
- 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
- 408
- Möbius Function
- 1
- Radical
- 515
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 123
- 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
- fünfhundertfünfzehn· ordinal: fünfhundertfünfzehnste
- English
- five hundred fifteen· ordinal: five hundred fifteenth
- Spanish
- quinientos quince· ordinal: 515º
- French
- cinq cent quinze· ordinal: cinq cent quinzième
- Italian
- cinquecentoquindici· ordinal: 515º
- Latin
- quingenti quindecim· ordinal: 515.
- Portuguese
- quinhentos e quinze· ordinal: 515º
Appears in sequences
- Number of points of norm <= n in cubic lattice.at n=5A000605
- a(n) is the solution to the postage stamp problem with n denominations and 3 stamps.at n=16A001213
- Primes multiplied by 5.at n=26A001750
- Number of partitions of n into parts 2, 3, 4, 5, 6, 7.at n=37A001996
- Palindromes in base 10.at n=60A002113
- From a definite integral.at n=6A002571
- Expansion of 1 / ((1-x)^2*(1-x^2)*(1-x^3)*(1-x^4)).at n=18A002621
- Numbers k such that (k^2 + k + 1)/7 is prime.at n=44A002641
- Number of bipartite partitions.at n=8A002762
- Number of partitions of n into parts 5k+1 or 5k+4.at n=43A003114
- Numbers that are the sum of 5 positive 4th powers.at n=31A003339
- Numbers that are the sum of 11 positive 6th powers.at n=8A003367
- Numbers that are the sum of 7 positive 7th powers.at n=4A003374
- Numbers that are the sum of 5 nonzero 8th powers.at n=2A003383
- Numbers that are the sum of 4 positive 9th powers.at n=1A003393
- Numbers of the form 2^j + 3^k, for j and k >= 0.at n=50A004050
- Divisible only by primes congruent to 5 mod 7.at n=26A004623
- Primes written in base 6.at n=42A004680
- Primes written in base 7.at n=54A004681
- Numbers that are the sum of at most 7 positive 7th powers.at n=29A004869