Properties of the Number 21033

Twenty-One Thousand Thirty-Three

Basics

Value: 21032 → 21033 → 21034

Parity: odd

Prime: No

Previous Prime: 21031

Next Prime: 21059

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 19 × 41

Divisors: 1, 3, 9, 19, 27, 41, 57, 123, 171, 369

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101001000101001

Octal: 51051

Duodecimal: 10209

Hexadecimal: 5229

Square: 442387089

Square Root: 145.02758358326184

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

Expansion of ∏_k>=1 (1 + x^3·k) / (1 - x^k). A266648

Number of n-bead asymmetric bracelets with exactly 3 different colored beads. A326660

A trace sequence for a Napoleon graph. A94632

Numbers n such that sum of cubes of digits of n equals the sum of prime divisors of n. A217531

Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime. A251838

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 41", based on the 5-celled von Neumann neighborhood. A269874

a(n) = floor(∑_{k=n⁴..(n+1)⁴} k^1/4). A374489

Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 5-point barb 1,1 1,2 2,2 2,3 3,2 in any orientation. A146140

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (1, -1, 1), (1, 1, -1), (1, 1, 0)}. A148966

a(1) = 15; then numbers obtained at every stage of division by 3 in the following process: multiply by 3, reverse the digits, divide by 3, reverse the digits, multiply by 3, reverse the digit, divide by 3. A83823