Properties of the Number 206

Two Hundred Six

Basics

Value: 205 → 206 → 207

Parity: even

Prime: No

Previous Prime: 199

Next Prime: 211

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 2 × 103

Divisors: 1, 2, 103, 206

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001110

Octal: 316

Duodecimal: 152

Hexadecimal: ce

Square: 42436

Square Root: 14.352700094407323

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

Positive integers congruent to 2 (mod 4): a(n) = 4·n+2, for n >= 0. A16825

The primes doubled; even semiprimes. A100484

Numbers k such that k² + 1 is prime. A5574

Numbers that contain a digit 0. A11540

Ulam numbers: a(1) = 1; a(2) = 2; for n>2, a(n) = least number > a(n-1) which is a unique sum of two distinct earlier terms. A2858

Numbers k such that k and k+1 have same sum of divisors. A2961

Nontotients: even numbers k such that φ(m) = k has no solution. A5277

Numbers k such that the k-th and the (k+1)-st primes are twin primes. A29707

a(n) = 5·n + 1. A16861

Numbers that are the product of an even number of distinct primes. A30229