Properties of the Number 23521

Twenty-Three Thousand Five Hundred Twenty-One

Basics

Value: 23520 → 23521 → 23522

Parity: odd

Prime: No

Previous Prime: 23509

Next Prime: 23531

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 43 × 547

Divisors: 1, 43, 547, 23521

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101101111100001

Octal: 55741

Duodecimal: 11741

Hexadecimal: 5be1

Square: 553237441

Square Root: 153.36557632011167

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

Pseudoprimes to base 3. A5935

Strong pseudoprimes to base 3. A20229

Euler pseudoprimes to base 3: composite integers such that abs(3^{(n - 1}/2)) == 1 mod n. A262051

28-gonal numbers: a(n) = n*(13·n - 12). A161935

Base-3 Euler-Jacobi pseudoprimes. A48950

Composite numbers k == 1, 11 (mod 12) such that 3^(k-1/2) == 1 (mod k). A375917

Base-6 Armstrong or narcissistic numbers, written in base 6. A10347

Numbers n such that the decimal number concat(9,n) is a square. A273364

Strong pseudoprimes to base 9. A20235

a(n) = 30·n² + 1. A158558