Properties of the Number 80722

Eighty Thousand Seven Hundred Twenty-Two

Basics

Value: 80721 → 80722 → 80723

Parity: even

Prime: No

Previous Prime: 80713

Next Prime: 80737

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 40361

Divisors: 1, 2, 40361, 80722

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: 10011101101010010

Octal: 235522

Duodecimal: 3A86A

Hexadecimal: 13b52

Square: 6516041284

Square Root: 284.1161734220704

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 T(n,k) of equivalence classes of ways of placing k 4 X 4 tiles in an n X n square under all symmetry operations of the square; irregular triangle T(n,k), n>=4, 0<=k<=floor(n/4)², read by rows. A236757

a(n) is the smallest value of k such that number of non-unitary prime divisors of k-th Catalan number, A000108(k) = C(2·k,k)/(k+1) equals n. A81395

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11000-01111-11000 pattern in any orientation. A147453

a(0) = 0; for n > 0, a(n) is taken to be the smallest positive integer greater than a(n-1) which is consistent with the condition "n is a term of the sequence if and only if a(n) == 1 (mod 3)". A80722