2315
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2784
- Proper Divisor Sum (Aliquot Sum)
- 469
- 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
- 1848
- Möbius Function
- 1
- Radical
- 2315
- 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
- 107
- Smith Number
- no
- Vampire 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
Appears in sequences
- Numbers that are the sum of 5 positive 6th powers.at n=17A003361
- Numbers that are the sum of 2 positive 7th powers.at n=4A003369
- a(n) = n^2 + prime(n).at n=45A004232
- Numbers that are the sum of at most 5 nonzero 6th powers.at n=51A004856
- Numbers that are the sum of at most 2 positive 7th powers.at n=8A004864
- Numbers that are the sum of at most 3 positive 7th powers.at n=13A004865
- Numbers that are the sum of at most 4 positive 7th powers.at n=19A004866
- Numbers that are the sum of at most 5 positive 7th powers.at n=26A004867
- Numbers that are the sum of at most 6 positive 7th powers.at n=34A004868
- Numbers that are the sum of at most 7 positive 7th powers.at n=43A004869
- Numbers that are the sum of at most 8 positive 7th powers.at n=53A004870
- a(n) = 2^n + 3^n.at n=7A007689
- Coordination sequence T4 for Zeolite Code MEI.at n=35A008149
- Coordination sequence T2 for Zeolite Code SGT.at n=30A008230
- 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=26A031412
- Number of partitions of n into parts 4k+2 or 4k+3.at n=53A035366
- Number of partitions of n with equal nonzero number of parts congruent to each of 0 and 2 (mod 5).at n=37A035563
- Number of partitions of n into parts not of the form 13k, 13k+6 or 13k-6. Also number of partitions with at most 5 parts of size 1 and differences between parts at distance 5 are greater than 1.at n=29A035954
- Centered cube numbers: (n+1)^7 + n^7.at n=2A036085
- Positive numbers having the same set of digits in base 9 and base 10.at n=17A037443