Properties of the Number 20522

Twenty Thousand Five Hundred Twenty-Two

Basics

Value: 20521 → 20522 → 20523

Parity: even

Prime: No

Previous Prime: 20521

Next Prime: 20533

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 × 31 × 331

Divisors: 1, 2, 31, 62, 331, 662, 10261, 20522

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000000101010

Octal: 50052

Duodecimal: BA62

Hexadecimal: 502a

Square: 421152484

Square Root: 143.2550173641398

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

Numbers k such that there is 1 prime between 100·k and 100·k + 99. A186393

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the upper median plus the minimum minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one. A237785

Number of monohedral disk tilings of type C^t_{3,n}. A296361

Numbers k such that prime(k) + {1,2,3,4,5,6} are all products of three primes. A255194

Number of (n+1)X(2+1) 0..3 arrays with the maximum plus the upper median plus the minimum minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one. A237781

Numbers n such that prime(n) + {1, 2, 3, 4, 5, 6} are all products of the same number of primes (not necessarily all distinct). A255202

Numbers k such that k and k-1 both first appear in the same power of 2 (in base 10). A322919

a(n) = 4ⁿ - 2ⁿ. A20522