Properties of the Number 9215

Nine Thousand Two Hundred Fifteen

Basics

Value: 9214 → 9215 → 9216

Parity: odd

Prime: No

Previous Prime: 9209

Next Prime: 9221

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 × 19 × 97

Divisors: 1, 5, 19, 95, 97, 485, 1843, 9215

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 10001111111111

Octal: 21777

Duodecimal: 53BB

Hexadecimal: 23ff

Square: 84916225

Square Root: 95.99479152537391

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

Composite numbers n such that bⁿ⁺¹ == 1 (mod n) for every b coprime to n. A208728

a(n) = n*(13·n - 9)/2. A226488

Number of chessboard polyominoes with n squares. A1933

Expansion of (1+x²-x³)/((1-x)*(1-2·x)). A52996

a(n) = 36n² - 1. A136017

Numbers k such that 2^k+1 == 1 (mod k). A187787

a(n) = 16n² + 32n + 15. A141759

Odd interprimes divisible by 19. A126231

Number of paths from (0,0) to (n+2,n) using only up and right steps and avoiding two or more consecutive moves up or three or more consecutive moves right. A177787

a(n) = 9·n²-1. A136016