Properties of the Number 21544

Twenty-One Thousand Five Hundred Forty-Four

Basics

Value: 21543 → 21544 → 21545

Parity: even

Prime: No

Previous Prime: 21529

Next Prime: 21557

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 2693

Divisors: 1, 2, 4, 8, 2693, 5386, 10772, 21544

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101010000101000

Octal: 52050

Duodecimal: 10574

Hexadecimal: 5428

Square: 464143936

Square Root: 146.77874505527018

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 integer partitions of n whose product of parts is >= n. A319005

Powers of cube root of 10 rounded to nearest integer. A18004

Powers of cube root of 10 rounded down. A18003

Largest number whose cube has n digits. A61439

a(n) = a(n-1) + a(n-2) + 3·a(n-3), with a(0) = 1, a(1) = 0, a(2) = 1. A103143

Expansion of (1-3·x)/(1-8·x+14·x²). A161731

T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 4. A252397

Total number of parts that are neither the smallest part nor the largest part in all partitions of n. A182977

Square array of Pell related numbers, read by antidiagonals. A86350

Those terms of A255571 whose every A080541/A080542-rotation is also a term of A255571. A258001