Properties of the Number -2221222

Two Hundred Twenty-One Thousand Two Hundred Twenty-Two

Basics

Value: -2221223 → -2221222 → -2221221

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 13

Digital Root: 4

Palindrome: Yes

Factorization: 2 × 1110611

Divisors: 1, 2, 1110611, 2221222

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1000011110010010100110

Octal: -10362246

Duodecimal: -8B151A

Hexadecimal: -21e4a6

Square: 4933827173284

Square Root: 1490.3764625087179

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

a(n) = 2*(10²ⁿ⁺¹-1)/9 - 10ⁿ. A332121

Numbers n which in decimal have the form imj, where m is the middle digit, with property that j is the reversal of i, and i = m·j. A82945

k th digit of a(n) is the number of different digits within 3 of k (not including k). A39989

k th digit of a(n) is the number of different digits within 4 of k (not including k). A39990