Properties of the Number 6221

Six Thousand Two Hundred Twenty-One

Basics

Value: 6220 → 6221 → 6222

Parity: odd

Prime: Yes

Previous Prime: 6217

Next Prime: 6229

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 6221

Divisors: 1, 6221

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1100001001101

Octal: 14115

Duodecimal: 3725

Hexadecimal: 184d

Square: 38700841

Square Root: 78.87331614684399

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

Expansion of e.g.f.: 1/(2-x-exp(x)). A6155

Primes with first digit 6. A45712

Denominators of an Egyptian fraction for 1/sqrt(29) = 0.185695338... (A020786). A145003

Number A(n,k) of length-n restricted growth strings (RGS) with growth <= k and first element in [k]; square array A(n,k), n>=0, k>=0, read by antidiagonals. A306024

Numbers n such that every digit occurs at least once in n³. A119735

T(n,k)=Number of nXk 0..n+k-2 arrays with upper left zero and lower right n+k-2 and each element differing from its horizontal and antidiagonal neighbors by one or two. A265466

5th row of number array A083064. A83066

Square number array T(n,k) = (k*(k+2)ⁿ+1)/(k+1) read by antidiagonals. A83064

Number of integer partitions of n whose odd parts have a common divisor > 1. A366842

Primes p such that the multiplicative order of 2 modulo p is (p-1)/5. A1135