Properties of the Number 9155

Nine Thousand One Hundred Fifty-Five

Basics

Value: 9154 → 9155 → 9156

Parity: odd

Prime: No

Previous Prime: 9151

Next Prime: 9157

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 5 × 1831

Divisors: 1, 5, 1831, 9155

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001111000011

Octal: 21703

Duodecimal: 536B

Hexadecimal: 23c3

Square: 83814025

Square Root: 95.68176419778223

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

a(n) is the number of tetrapods standing on the four edges of an n X n grid, so that no two feet are the same distance apart and no foot is on a corner. Tetrapods with congruent footprints are counted only once. A353447

4·a(n) is the maximum possible determinant of a 3 X 3 matrix whose entries are 9 consecutive primes starting with prime(n). A340923

For 1<=x<=n, 1<=y<=n, write gcd(x,y) = u·x+v·y with u,v minimal; a(n) = sum of the values of |u|. A345432

Numbers k such that the heptagonal number H(k) is equal to the sum of the pentagonal numbers P(m), P(m+1), P(m+2) and P(m+3) for some m. A252770

Halogen sequence: a(n) = A018227(n)-1. A271999

Semiprimes that are the sum of two successive terms of A092192. A366167

Number of non-similar triangles possible with distinct positive integer side lengths of at most n units. A373051

Indices n of primes p(n), p(n+2) such that p(n)+1 and p(n+2)+1 have the same largest prime factor. A105404

Odd nonprimes n such that n+d+1 is prime for all divisors d of n. A187554

Diagonal of the rational function 1/(1 - x - y - z - x y - y z - x y z). A274780