Properties of the Number 15431

Fifteen Thousand Four Hundred Thirty-One

Basics

Value: 15430 → 15431 → 15432

Parity: odd

Prime: No

Previous Prime: 15427

Next Prime: 15439

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 13 × 1187

Divisors: 1, 13, 1187, 15431

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11110001000111

Octal: 36107

Duodecimal: 8B1B

Hexadecimal: 3c47

Square: 238115761

Square Root: 124.22157622571048

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

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction. A250942

T(n,k) = Number of (n+1) X (k+1) 0..2 arrays with row and column sums nondecreasing, and no adjacent elements equal. A233408

5-Modular Catalan Numbers C_n,5. A261588

a(n) = ∑_i=0..n digsum(i)⁴, where digsum(i) = A007953(i). A231689

Number of equivalence classes of convex lattice polygons of genus n, restricting the count to those polygons that are interior to another polygon. A322344

Number of linear connected animals formed from n 6-gon connected truncated octahedra. A363208

Numbers k such that prime(k+2)-(k+2)*τ(k+2) = prime(k-2)-(k-2)*τ(k-2) where τ(k) = A000005(k) is the number of divisors of k. A67354

Numbers k such that k + (largest digit of k)! is a palindromic prime. A95920

Number of (n+1)X(3+1) 0..2 arrays with row and column sums nondecreasing, and no adjacent elements equal. A233404

Number of (n+1)X(4+1) 0..2 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction. A250938