Properties of the Number 25318

Twenty-Five Thousand Three Hundred Eighteen

Basics

Value: 25317 → 25318 → 25319

Parity: even

Prime: No

Previous Prime: 25309

Next Prime: 25321

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 12659

Divisors: 1, 2, 12659, 25318

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110001011100110

Octal: 61346

Duodecimal: 1279A

Hexadecimal: 62e6

Square: 641001124

Square Root: 159.116309660575

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

a(n) = ∑_k=0..n C(2k+2,k)*C(2k+2,n-k) ; equals row 2 of square array A137634 ; also equals the convolution of A137635 and the self-convolution of A073157. A137637

Positions of incrementally largest terms in the continued fraction for Euler's constant γ (A002852). A33092

Square array where T(n,k) = ∑_j=0..k C(n+2·j,j)*C(n+2·j,k-j), read by antidiagonals. A137634

Number of nX4 0..1 arrays with every element equal to 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero. A298656

Number of (n+1) X (4+1) 0..2 arrays colored with the upper median value of each 2 X 2 subblock. A235950

Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 2 ones in any 5 X 5 X 5 subtriangle. A153919

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the upper median value of each 2X2 subblock. A235954

a(n) = (1/5ⁿ) * ∑_k=0..n² ( (binomial(n², k) * 2^n²-k * 3^k) (mod 5ⁿ) ). A376535

Numbers that are the sum of 2 distinct nonzero squares in 8 or more ways. A25318

If a geodesic dome is made by dividing each triangle of an icosahedron into n² identical equilateral triangles and the vertices of those newly created triangles are pushed out from the center to lie on the surface of the sphere in which the icosahedron is inscribed, then this sequence gives the number of different strut lengths that are required to build the dome. A97108