Properties of the Number 72220

Seventy-Two Thousand Two Hundred Twenty

Basics

Value: 72219 → 72220 → 72221

Parity: even

Prime: No

Previous Prime: 72211

Next Prime: 72221

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 5 × 23 × 157

Divisors: 1, 2, 4, 5, 10, 20, 23, 46, 92, 115

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10001101000011100

Octal: 215034

Duodecimal: 35964

Hexadecimal: 11a1c

Square: 5215728400

Square Root: 268.73779042032777

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

An accelerator sequence for Catalan's constant. A94648

T(n,k)=Number of -k..k arrays x(0..n-1) of n elements with sum zero and with zeroth through n-1st differences all nonzero. A200038

Trace sequence of a path graph plus loop. A96975

Numbers k such that k+1, k+3, k+7 and k+9 are all primes. A125855

G.f. satisfies: A(x) = A(x²)² + x·A(x)². A182144

Number of -n..n arrays x(0..5) of 6 elements with sum zero and with zeroth through 5th differences all nonzero. A200042

Number of -6..6 arrays x(0..n-1) of n elements with sum zero and with zeroth through n-1st differences all nonzero. A200036

a(n)-th factorial is the smallest factorial containing exactly n 9's, or 0 if no such number exists. A72220

G.f. satisfies: A(x) = ( A(x²) + x·A(x) )². A182325