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Properties of the Number 15444

Fifteen Thousand Four Hundred Forty-Four

Basics

Value: 15443 → 15444 → 15445

Parity: even

Prime: No

Previous Prime: 15443

Next Prime: 15451

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 2 × 3 3 × 11 × 13

Divisors: 1, 2, 3, 4, 6, 9, 11, 12, 13, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11110001010100

Octal: 36124

Duodecimal: 8B30

Hexadecimal: 3c54

Square: 238517136

Square Root: 124.27389106324787

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

Number of pairwise coprime strict compositions of n, where a singleton is not considered coprime unless it is (1). A337561
Triangle read by rows, T(n,k) = C(n,k)*C(2·k,k)/(k+1), n >= 0, 0 <= k <= n. A98474
Values of the difference d for 6 primes in geometric-arithmetic progression with the minimal sequence {7·7j + j·d}, j = 0 to 5. A209205
Sequence arising from enumeration of domino tilings of Aztec Pillow-like regions. A92443
Triangle read by rows. T(n, k) = binomial(n, k) * CatalanNumber(n - k). A124644
a(n) = C(n)*(5·n+1) where C(n) = Catalan numbers (A000108). A51945
Product of the sum of the divisors of n and the sum of the divisors of n-th prime. A272173
Triangle read by rows, T(n, k) = [xk] p(n), where p(n) = hypergeom([1/2, -n - 1, -n], [2, 2], 4·x). A367023
Number of ordered octuples of distinct pairwise coprime positive integers with largest element n. A186979
Triangle read by rows: T(n,k) = binomial(n+1,k+1) * binomial(3·n-2·k+1,k) / (n+1), 0<=k<=n. A391046