Properties of the Number 305

Three Hundred Five

Basics

Value: 304 → 305 → 306

Parity: odd

Prime: No

Previous Prime: 293

Next Prime: 307

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 5 × 61

Divisors: 1, 5, 61, 305

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110001

Octal: 461

Duodecimal: 215

Hexadecimal: 131

Square: 93025

Square Root: 17.46424919657298

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

a(n) = n + (n+1)². A28387

Denominators of continued fraction convergents to sqrt(5). A1076

Ordered hypotenuses (with multiplicity) of primitive Pythagorean triangles. A20882

a(n) = 6·n + 5. A16969

a(0) = 1, a(n) = sum of digits of all previous terms. A4207

a(n) = 8·n + 1. A17077

a(n) = 10·n + 5. A17329

a(n) = n-th prime + n. A14688

Number of integer partitions of n with all distinct run-sums. A353837

Table by antidiagonals of T(n,k) = n·T(n,k-1) + T(n,k-2) starting with T(n,1) = 1. A73133