Properties of the Number 40215

Forty Thousand Two Hundred Fifteen

Basics

Value: 40214 → 40215 → 40216

Parity: odd

Prime: No

Previous Prime: 40213

Next Prime: 40231

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 7 × 383

Divisors: 1, 3, 5, 7, 15, 21, 35, 105, 383, 1149

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001110100010111

Octal: 116427

Duodecimal: 1B333

Hexadecimal: 9d17

Square: 1617246225

Square Root: 200.53677966896745

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

Integers of the form 8k + 7 that can be written as a sum of four distinct squares of the form m, m + 1, m + 3, m + 5, where m == 2 (mod 4). A243580

Odd numbers with exactly 4 distinct palindromic prime factors. A46406

Near 2-hyperperfect numbers: numbers k such that σ(k) - 3·k/2 - 1/2 is a proper divisor of k. A305616

a(n) = (n+1)! - (n)!!. A127111

a(1) = 3, a(n) = a(n-1) + 4*(a(n-1)-floor(a(n-1)^1/3)³). A96297

Continued fraction for sqrt(231). A40215