Properties of the Number 204

Two Hundred Four

Basics

Value: 203 → 204 → 205

Parity: even

Prime: No

Previous Prime: 199

Next Prime: 211

Digit Sum: 6

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 17

Divisors: 1, 2, 3, 4, 6, 12, 17, 34, 51, 68

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 11001100

Octal: 314

Duodecimal: 150

Hexadecimal: cc

Square: 41616

Square Root: 14.2828568570857

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

Square pyramidal numbers: a(n) = 0² + 1² + 2² + ... + n² = n*(n+1)*(2·n+1)/6. A330

Abundant numbers (sum of divisors of m exceeds 2m). A5101

List of totally balanced sequences of 2n binary digits written in base 10. Binary expansion of each term contains n 0's and n 1's and reading from left to right (the most significant to the least significant bit), the number of 0's never exceeds the number of 1's. A14486

Triangle of coefficients of polynomials u(n,x) jointly generated with A029653; see the Formula section. A208510

Numbers in base 5. A7091

Niven (or Harshad, or harshad) numbers: numbers that are divisible by the sum of their digits. A5349

Multiples of 4. A8586

Refactorable numbers: number of divisors of k divides k. Also known as τ numbers. A33950

a(n)² is a triangular number: a(n) = 6·a(n-1) - a(n-2) with a(0)=0, a(1)=1. A1109

Practical numbers: positive integers m such that every k <= σ(m) is a sum of distinct divisors of m. Also called panarithmic numbers. A5153

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