Properties of the Number -21913

Twenty-One Thousand Nine Hundred Thirteen

Basics

Value: -21914 → -21913 → -21912

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 17 × 1289

Divisors: 1, 17, 1289, 21913

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101010110011001

Octal: -52631

Duodecimal: -10821

Hexadecimal: -5599

Square: 480179569

Square Root: 148.03040228277433

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

Alternating sum of centered heptagonal pyramidal numbers. A270694

Number of intersection points of all lines through pairs of vertices of a regular n-gon. A146212

Number of consecutive prime runs of 8 primes congruent to 3 mod 4 below 10ⁿ. A92658

Numbers k such that A339549(k) = A339549(k+1). A339550

Number of vertices in graph G_n formed by taking a regular n-gon with all its chords extended to infinity (the n-th graph in A344857) and inverting it in its circumscribing circle. A383461

Sum of n plus its prime factors associated with A020700. A20905

Number of 5-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero and first differences in -n..n. A208996

A146212(2·n). A347321

a(n) = (prime(n) + prime(n+2))² + prime(n+1)². A348569