Properties of the Number 21335

Twenty-One Thousand Three Hundred Thirty-Five

Basics

Value: 21334 → 21335 → 21336

Parity: odd

Prime: No

Previous Prime: 21323

Next Prime: 21341

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 5 × 17 × 251

Divisors: 1, 5, 17, 85, 251, 1255, 4267, 21335

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001101010111

Octal: 51527

Duodecimal: 1041B

Hexadecimal: 5357

Square: 455182225

Square Root: 146.06505399992156

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

Partial sums of A299272. A299273

T(n,k)=Number of nXk binary arrays indicating whether each 2X2 subblock of a larger binary array has lexicographically increasing rows and columns, for some larger (n+1)X(k+1) binary array with rows and columns of the latter in lexicographically nondecreasing order. A227089

a(n) = ∑_k=0..n (-1)^k * binomial(4·n-k+2,n-k). A390547

Number of connected subsets of n edges of the icosidodecahedron up to the 120 rotations and reflections of the icosidodecahedron. A383984

Expansion of the g.f. (x²-x+1)*(x²-3·x+3)/(x-1)⁶. A257890

Number of nX4 binary arrays indicating whether each 2X2 subblock of a larger binary array has lexicographically increasing rows and columns, for some larger (n+1)X5 binary array with rows and columns of the latter in lexicographically nondecreasing order. A227087

Numbers with at least three digits and with the property that the sum of the cubes of the first and last digit equals the number obtained when the first and last digits are deleted. A275343

Smallest semiprime q such that 2·prime(n) - q is semiprime, or a(n)=0 if there is no such q. A241535

Number of nX4 0..1 arrays with no 1 adjacent to 2 king-move neighboring 1s. A297081

Decimal expansion of 1/331. A21335