15190
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 32832
- Proper Divisor Sum (Aliquot Sum)
- 17642
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5040
- Möbius Function
- 0
- Radical
- 2170
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 4
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
- 133
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
Appears in sequences
- Coordination sequence for MgZn2, Position Zn1.at n=31A009937
- Even 10-gonal (or decagonal) numbers.at n=31A028994
- Starting positions of strings of 3 1's in the decimal expansion of Pi.at n=16A050209
- a(n+1) = a(n) + (if a(n) is odd then (next odd square) else (next even square)), a(0) = 1.at n=23A116955
- Decagonal numbers divisible by 10.at n=13A117797
- Number of parts that are visible in one of the three views of the section model of partitions version "tree" with n sections.at n=32A194805
- Number of partitions of n such that 2*(greatest part) >= (number of parts).at n=35A237755
- Integers k such that A072473(k) = A072473(k+1) = A072473(k+2) = A072473(k+3).at n=1A255172
- Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 206", based on the 5-celled von Neumann neighborhood.at n=13A279828
- Harary index of the n X n queen graph.at n=14A296196
- Records in A181159.at n=27A306332
- Starts of runs of 3 consecutive factorial base Niven numbers (A118363).at n=10A328206
- Even numbers 2m such that A352612(2m) = A103131(2m).at n=33A352587
- Numbers k such that sigma(k) = psi(k) + tau(k)^2.at n=23A390296