Properties of the Number 822

Eight Hundred Twenty-Two

Basics

Value: 821 → 822 → 823

Parity: even

Prime: No

Previous Prime: 821

Next Prime: 823

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 137

Divisors: 1, 2, 3, 6, 137, 274, 411, 822

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100110110

Octal: 1466

Duodecimal: 586

Hexadecimal: 336

Square: 675684

Square Root: 28.6705423736629

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

Average of twin prime pairs. A14574

Indices k such that (1/3)*(prime(k)+prime(k+1)+prime(k+2)) is a prime. A64113

Mian-Chowla sequence (a B₂ sequence): a(1) = 1; for n>1, a(n) = smallest number > a(n-1) such that the pairwise sums of elements are all distinct. A5282

Primitive abundant numbers: abundant numbers (A005101) having no abundant proper divisor. A91191

G.f.: ∏_k>=1 (1 + 2·x^k). A32302

Unitary abundant numbers: numbers k such that usigma(k) > 2·k. A34683

Number of unlabeled planar simple graphs with n nodes. A5470

Numbers k such that the Woodall number k·2^k - 1 is prime. A2234

Number of strict integer partitions of n with no adjacent parts having quotient > 2. A342095

Numbers k whose abundance is 12: σ(k) - 2·k = 12. A141545