Properties of the Number 81956

Eighty-One Thousand Nine Hundred Fifty-Six

Basics

Value: 81955 → 81956 → 81957

Parity: even

Prime: No

Previous Prime: 81953

Next Prime: 81967

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 7 × 2927

Divisors: 1, 2, 4, 7, 14, 28, 2927, 5854, 11708, 20489

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10100000000100100

Octal: 240044

Duodecimal: 3B518

Hexadecimal: 14024

Square: 6716785936

Square Root: 286.27958362412085

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 discordant permutations. A561

Number of 2 X 2 matrices having all terms in {1,...,n} and determinant >n. A211060

Number of nondecreasing arrangements of n+2 numbers in 0..n with the last equal to n and each after the second equal to the sum of one or two of the preceding four. A189319

Number of length 5 0..n arrays with each partial sum starting from the beginning no more than sqrt(3) standard deviations from its mean. A244944

T(n,k)=Number of length n 0..k arrays with each partial sum starting from the beginning no more than sqrt(3) standard deviations from its mean. A244940

Duplicate of A056182. A81956