Properties of the Number 23109

Twenty-Three Thousand One Hundred Nine

Basics

Value: 23108 → 23109 → 23110

Parity: odd

Prime: No

Previous Prime: 23099

Next Prime: 23117

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 7703

Divisors: 1, 3, 7703, 23109

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101101001000101

Octal: 55105

Duodecimal: 11459

Hexadecimal: 5a45

Square: 534025881

Square Root: 152.0164464786623

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Positive integers k such that k!!! - 1 = A007661(k) - 1 is prime. A84438

Convolved Fibonacci numbers. A1628

Triangle of coefficients of (1 - x)ⁿ*U(n,-(3·x - 2)/(2·x - 2)), where U(n,x) is the n-th Chebyshev polynomial of the second kind. A123027

Bisection of Fibonacci triangle A037027: odd-indexed members of column sequences of A037027 (not counting leading zeros). A60921

Triangle read by rows: T(n,k) is the number of secondary structures of size n (n>=0) having k stacks of length 1 (k>=0). A202838

Third column (m=2) of triangle A060921 (bisection of Fibonacci triangle, odd part). A61182

E.g.f. satisfies A(x) = 1/(1 - A(x)³ * (exp(x·A(x)³) - 1)). A377498

Number of 3 X n 0..2 arrays with antidiagonals unimodal and rows and diagonals nondecreasing. A224001

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 517", based on the 5-celled von Neumann neighborhood. A272732

Semiprimes of the form k² + 5. A361696