Properties of the Number 81088

Eighty-One Thousand Eighty-Eight

Basics

Value: 81087 → 81088 → 81089

Parity: even

Prime: No

Previous Prime: 81083

Next Prime: 81097

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ⁶ × 7 × 181

Divisors: 1, 2, 4, 7, 8, 14, 16, 28, 32, 56

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110011000000

Octal: 236300

Duodecimal: 3AB14

Hexadecimal: 13cc0

Square: 6575263744

Square Root: 284.75954768892296

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

Matrix square of Stirling-1 triangle A008275. A39814

Positive integers m such that (m+4)³ - m³ is a square. A263942

T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A326105

T(n, k) = [x^k] ∑_k=0..n Stirling1(n, k)*FallingFactorial(x, k), triangle read by rows, for n >= 0 and 0 <= k <= n. A325872

a(n) = ∑_k=n..2·n |Stirling1(2·n, k) * Stirling1(k, n)|. A341589

a(n) is the least number that is the sum of two cubes of primes and is 2ⁿ times an odd number. A359448

Expansion of e.g.f.: cosh(x)/exp(tan(x)). A9186

Expansion of e.g.f. sinh(tan(x))*exp(x). A9605

Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A326101

Number of nX5 0..1 arrays with every element equal to 0, 1, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A326102