Properties of the Number 25518

Twenty-Five Thousand Five Hundred Eighteen

Basics

Value: 25517 → 25518 → 25519

Parity: even

Prime: No

Previous Prime: 25471

Next Prime: 25523

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 4253

Divisors: 1, 2, 3, 6, 4253, 8506, 12759, 25518

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110001110101110

Octal: 61656

Duodecimal: 12926

Hexadecimal: 63ae

Square: 651168324

Square Root: 159.74354447050436

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) = T(2·n, n-2), where T is given by A026584. A26592

Array read by antidiagonals: T(n,k) is the number of n X n symmetric binary matrices with no row sum greater than k. A334548

Numbers k such that k⁵*2^k + 1 is a prime. A367421

Number of n X n symmetric binary matrices with no row sum greater than 2. A139678

Number of graphs of order n with exactly one Hamiltonian cycle of girth at least 4. A374312

Number of length 3 1..(n+2) arrays with no leading partial sum equal to a prime and no consecutive values equal. A255718

a(n) = T(4n,n), where T is the array defined in A024996. A26075

T(2n,n-2), T given by A026568. A26576

Number of permutations of floor(i·9/8), i=0..n-1, with all sums of two and three adjacent terms respectively unique. A147899

Numbers n such that 2^n-1, (2·n-1)*(2^(n-1/2)), (4·ceiling((3/4)*n)-2), and (2⁽ⁿ⁺¹/2) + floor((1/4)*n)*2⁽⁽ⁿ⁺¹/2)+1)) are all congruent to 1 (mod n). A294912