Properties of the Number -222221

Two Hundred Twenty-Two Thousand Two Hundred Twenty-One

Basics

Value: -222222 → -222221 → -222220

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 359 × 619

Divisors: 1, 359, 619, 222221

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110110010000001101

Octal: -662015

Duodecimal: -A8725

Hexadecimal: -3640d

Square: 49382172841

Square Root: 471.403224426817

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

List of co-Lyndon words on {1,2} sorted first by length and then lexicographically. A329318

For k in {2,3,...,9} define a sequence as follows: a(0)=0; for n>=0, a(n+1)=a(n)+1, unless a(n) ends in k, in which case a(n+1) is obtained by replacing the last digit of a(n) with the digit(s) of k². This is k(4). A237341

a(n) = (2·10ⁿ - 11)/9. A165402

Rotating digits of a(n)² right once still yields a square. A45877

Expansion of g.f. x*(1+10·x)/((1-x)*(1-10·x²)). A94623

Shortest (x+1,2x)-code of n. A233135

Numbers k such that σ(k) + φ(k) is a repdigit. A116019

List of pairs (n,m) with n < m such that the decimal expansion of m is a cyclic shift of that of n and m² is a cyclic shift of n². A134514

Numbers k that are the representation of primes in base 3 and in base 4. A340290

Near-repdigit semiprimes with 2 as repeated digit. A105983