951
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1272
- Proper Divisor Sum (Aliquot Sum)
- 321
- 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
- 632
- Möbius Function
- 1
- Radical
- 951
- 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
- 28
- 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
- neunhunderteinundfünfzig· ordinal: neunhunderteinundfünfzigste
- English
- nine hundred fifty-one· ordinal: nine hundred fifty-first
- Spanish
- novecientos cincuenta y uno· ordinal: 951º
- French
- neuf cent cinquante et un· ordinal: neuf cent cinquante et unième
- Italian
- novecentocinquantuno· ordinal: 951º
- Latin
- nongenti quinquaginta unus· ordinal: 951.
- Portuguese
- novecentos e cinquenta e um· ordinal: 951º
Appears in sequences
- Number of unlabeled mappings (or mapping patterns) from n points to themselves; number of unlabeled endofunctions.at n=8A001372
- Sum of logarithmic numbers.at n=5A002751
- a(n) = (n + 3)*(n^2 + 6*n + 2)/6.at n=15A005286
- Centered pentagonal numbers: (5n^2+5n+2)/2; crystal ball sequence for 3.3.3.4.4. planar net.at n=19A005891
- Convolve Fibonacci and Pell numbers.at n=9A006684
- Number of partitions of n into partition numbers.at n=33A007279
- Coordination sequence T4 for Zeolite Code DOH.at n=19A008081
- Coordination sequence T3 for Zeolite Code FER.at n=19A008108
- Coordination sequence T3 for Zeolite Code NES.at n=20A008207
- Partial sums of A001935; at one time this was conjectured to agree with A007478.at n=22A014605
- Expansion of 1/(1-x^10-x^11-x^12-x^13-x^14-x^15-x^16-x^17-x^18).at n=58A017894
- Numbers k such that the continued fraction for sqrt(k) has period 18.at n=20A020357
- Numbers k such that Fibonacci(k) == -2 (mod k).at n=18A023163
- Numbers with exactly 8 ones in binary expansion.at n=26A023690
- Coordination sequence T5 for Zeolite Code MWW.at n=21A024990
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (F(2), F(3), F(4), ...), t = A014306.at n=25A025110
- Number of partitions of n into an even number of parts, the least being 5; also, a(n+5) = number of partitions of n into an odd number of parts, each >=5.at n=57A027197
- Sequence satisfies T^2(a)=a, where T is defined below.at n=37A027586
- a(n)=least k such that s(k)=n, where s=A030717.at n=21A030720
- Numbers k such that the continued fraction for sqrt(k) has even period 2*m and the m-th term of the periodic part is 9.at n=14A031412