Properties of the Number -221931

Two Hundred Twenty-One Thousand Nine Hundred Thirty-One

Basics

Value: -221932 → -221931 → -221930

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 24659

Divisors: 1, 3, 9, 24659, 73977, 221931

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4938 Try Today's Challenge

Representations

Binary: -110110001011101011

Octal: -661353

Duodecimal: -A8523

Hexadecimal: -362eb

Square: 49253368761

Square Root: 471.0955317130486

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

Trajectory of 442 under the Reverse and Add! operation carried out in base 2. A75268

a(n) = 6·a(n-1)-8·a(n-2)-9 for n > 10; a(0)=629, a(1)=6585, a(2)=26259, a(3)=221931, a(4)=1917027, a(5)=18285939, a(6)=125792217, a(7)=703932681, a(8)=7131271077, a(9)=26172260445, a(10)=103884128445. A177421