Properties of the Number -72171

Seventy-Two Thousand One Hundred Seventy-One

Basics

Value: -72172 → -72171 → -72170

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ⁸ × 11

Divisors: 1, 3, 9, 11, 27, 33, 81, 99, 243, 297

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10001100111101011

Octal: -214753

Duodecimal: -35923

Hexadecimal: -119eb

Square: 5208653241

Square Root: 268.6466080187874

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

Numbers of the form 3ⁱ*11^j. A3597

Numbers of the form (9ⁱ)*(11^j), with i, j >= 0. A108687

Number of ternary trees (A001764) with n nodes and maximal diameter. A64017

Numbers which can be expressed as the product of numbers made of only threes. A161141

Numbers which can be expressed as the product of numbers made of only nines. A161147

Riordan array (1, x·c(3x)), c(x) the g.f. of A000108. A110518

a(n) = 3ⁿ*A123335(n). Rational parts of the integers in Q(sqrt(2)) giving the length of a Lévy C-curve variant at iteration step n. A251732

Square array where row n lists all numbers k for which A335885(k) = n, read by falling antidiagonals. A335910

Numbers k such that S(k)=d(k), where S(k) is the Kempner function (A002034) and d(k) is the number of divisors of k (A000005). A73307

Numbers n such that number of divisors of n divides S(n), the Kempner function A002034. A73413