Properties of the Number 326

Three Hundred Twenty-Six

Basics

Value: 325 → 326 → 327

Parity: even

Prime: No

Previous Prime: 317

Next Prime: 331

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 × 163

Divisors: 1, 2, 163, 326

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000110

Octal: 506

Duodecimal: 232

Hexadecimal: 146

Square: 106276

Square Root: 18.05547008526779

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

Central polygonal numbers (the Lazy Caterer's sequence): n(n+1)/2 + 1; or, maximal number of pieces formed when slicing a pancake with n cuts. A124

Total number of ordered k-tuples (k=0..n) of distinct elements from an n-element set: a(n) = ∑_k=0..n n!/k!. A522

The primes doubled; even semiprimes. A100484

Numbers k such that k² + 1 is prime. A5574

Happy numbers: numbers whose trajectory under iteration of sum of squares of digits map (see A003132) includes 1. A7770

Numbers k such that k and k+1 have the same number of divisors. A5237

Increasing sequence generated by these rules: a(1)=1, and if·is in a then 3x-2 and 4x-2 are in a. A191113

Number of points on surface of octahedron; also coordination sequence for cubic lattice: a(0) = 1; for n > 0, a(n) = 4n² + 2. A5899

Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of the Fibonacci self-fusion matrix (A202453). A202605

a(n) = n² + 2. A59100