Properties of the Number 81954

Eighty-One Thousand Nine Hundred Fifty-Four

Basics

Value: 81953 → 81954 → 81955

Parity: even

Prime: No

Previous Prime: 81953

Next Prime: 81967

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 29 × 157

Divisors: 1, 2, 3, 6, 9, 18, 29, 58, 87, 157

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10100000000100010

Octal: 240042

Duodecimal: 3B516

Hexadecimal: 14022

Square: 6716458116

Square Root: 286.27609051403505

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

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each row divisible by 5 and column not divisible by 5, read as a binary number with top and left being the most significant bits. A262795

Number of (n+2) X (4+2) 0..1 arrays with each row divisible by 5 and column not divisible by 5, read as a binary number with top and left being the most significant bits. A262791

Number of (3+2)X(n+2) 0..1 arrays with each row divisible by 5 and column not divisible by 5, read as a binary number with top and left being the most significant bits. A262798

Triangle read by rows: T(n, k) = 2^n-k*3^k, n >= 1, 0 <= k < n. A81954