355
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 432
- Proper Divisor Sum (Aliquot Sum)
- 77
- 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
- 280
- Möbius Function
- 1
- Radical
- 355
- 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
- 32
- Smith Number
- yes
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
- dreihundertfünfundfünfzig· ordinal: dreihundertfünfundfünfzigste
- English
- three hundred fifty-five· ordinal: three hundred fifty-fifth
- Spanish
- trescientos cincuenta y cinco· ordinal: 355º
- French
- trois cent cinquante-cinq· ordinal: trois cent cinquante-cinqième
- Italian
- trecentocinquantacinque· ordinal: 355º
- Latin
- trecenti quinquaginta quinque· ordinal: 355.
- Portuguese
- trezentos e cinquenta e cinco· ordinal: 355º
Appears in sequences
- Tribonacci numbers: a(n) = a(n-1) + a(n-2) + a(n-3) with a(0)=a(1)=a(2)=1.at n=11A000213
- Number of n-node unrooted quartic trees; number of n-carbon alkanes C(n)H(2n+2) ignoring stereoisomers.at n=12A000602
- Number of partitions of n in which no parts are multiples of 3.at n=23A000726
- Number of different quasi-orders (or topologies, or transitive digraphs) with n labeled elements.at n=4A000798
- Generalized Stirling numbers, [n+7,7]_4.at n=2A001718
- Primes multiplied by 5.at n=19A001750
- Numbers k for which the rank of the elliptic curve y^2 = x^3 - k is 2.at n=45A002154
- Denominators of convergents to cube root of 3.at n=7A002353
- Numerators of convergents to Pi.at n=5A002485
- Number of integer points in a certain quadrilateral scaled by a factor of n.at n=27A002789
- Number of precomplete Post functions.at n=4A002825
- Number of triangular cacti with 2n+1 nodes (n triangles).at n=9A003081
- Numbers that are the sum of 5 positive 4th powers.at n=23A003339
- Numbers that are the sum of 10 positive 4th powers.at n=39A003344
- a(n) = a(n-1) + 2*a(n-3).at n=11A003476
- Number of labeled nonseparable bipartite graphs on n nodes.at n=5A004100
- a(n) = floor(100*log(n)).at n=34A004237
- Numbers whose binary expansion ends in 011.at n=43A004769
- a(n) = round(n*phi^5), where phi is the golden ratio, A001622.at n=32A004940
- a(n) = ceiling(n*phi^5), where phi is the golden ratio, A001622.at n=32A004960