Properties of the Number 81722

Eighty-One Thousand Seven Hundred Twenty-Two

Basics

Value: 81721 → 81722 → 81723

Parity: even

Prime: No

Previous Prime: 81707

Next Prime: 81727

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 29 × 1409

Divisors: 1, 2, 29, 58, 1409, 2818, 40861, 81722

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011111100111010

Octal: 237472

Duodecimal: 3B362

Hexadecimal: 13f3a

Square: 6678485284

Square Root: 285.87060009731675

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 of triangles of weight prime(n) in the multiorder of integer partitions of prime numbers into prime parts. A316219

Row sums of triangle in A081720. A81722

Number of 3Xn 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. A281767