Properties of the Number 55216

Fifty-Five Thousand Two Hundred Sixteen

Basics

Value: 55215 → 55216 → 55217

Parity: even

Prime: No

Previous Prime: 55213

Next Prime: 55217

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ⁴ × 7 × 17 × 29

Divisors: 1, 2, 4, 7, 8, 14, 16, 17, 28, 29

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1101011110110000

Octal: 153660

Duodecimal: 27B54

Hexadecimal: d7b0

Square: 3048806656

Square Root: 234.98085028359225

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)*(5·n - 4)/2. A237616

4-dimensional analog of centered polygonal numbers: a(n) = n(n+1)*(n²+n+4)/12. A6007

Numbers k such that k² divides 15^k-1. A128395

Numbers·such that there exist three integers 0<x<=y<=z and t>0 such that σ(x)² = σ(y)² = σ(z)² = x² + y² + z² + t². A385531

Area of annuli of consecutive integer thickness. A114378

Triangle T(n,k) by rows, n >= 0, 0<=k<=n: T(n,k) = ∑_i=0..n-k binomial(n-k,i) *∑_j=0..k-i binomial(i,j). A55216

Carmichael numbers divisible by 17 and 29. A182381