Properties of the Number 7221

Seven Thousand Two Hundred Twenty-One

Basics

Value: 7220 → 7221 → 7222

Parity: odd

Prime: No

Previous Prime: 7219

Next Prime: 7229

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 29 × 83

Divisors: 1, 3, 29, 83, 87, 249, 2407, 7221

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1110000110101

Octal: 16065

Duodecimal: 4219

Hexadecimal: 1c35

Square: 52142841

Square Root: 84.97646733066749

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

Number of partitions of n into nonsquares. A87153

a(n) = (2·n+5)*(2·n+1). A78371

Number of integer partitions of n having no permutation with all equal run-lengths. A382915

a(n) = n³ + n² + 1. A98547

Numbers of the form a⁵ + b⁴ with a, b > 0. A100294

Numbers of the form a⁵ + b⁶, with integers a, b > 0. A303375

Fundamental discriminants of real quadratic number fields with class number 10. A218160

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the minimum plus the upper median equal to the lower median plus the maximum in every 2X2 subblock. A235884

Concentric 19-gonal numbers. A195048

a(n) = r·a(ceiling(n/2))+s·a(floor(n/2)) with a(1)=1 and (r,s)=(4,1). A268527