Properties of the Number 422

Four Hundred Twenty-Two

Basics

Value: 421 → 422 → 423

Parity: even

Prime: No

Previous Prime: 421

Next Prime: 431

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 2 × 211

Divisors: 1, 2, 211, 422

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110100110

Octal: 646

Duodecimal: 2B2

Hexadecimal: 1a6

Square: 178084

Square Root: 20.54263858417414

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

The primes doubled; even semiprimes. A100484

Number of separable partitions of n; see Comments. A325534

Number of steps until the RADD sequence T(k+1) = n + R(T(k)), T(0) = 1, enters a cycle; -1 if no cycle is ever reached. (R=A004086: reverse digits). A117816

Numbers that contain even digits only. A14263

Numbers m such that ∑_k=1..m (<1/2 + k·r> - <k·r>) = 0, where r=sqrt(2) and < > denotes fractional part. A194368

Numbers k with A033676(k)=2, where A033676 is the largest divisor <= sqrt(k). A161344

a(n) = n² + n + 2. A14206

Coefficients of the '5th-order' mock θ function chi₁(q). A53263

Number of corners, or planar partitions of n with only one row and one column. A6330

Triangle read by rows of achiral color patterns (set partitions) for a row or loop of length n. T(n,k) is the number using exactly k colors (sets). A304972