Properties of the Number -13215

Thirteen Thousand Two Hundred Fifteen

Basics

Value: -13216 → -13215 → -13214

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 881

Divisors: 1, 3, 5, 15, 881, 2643, 4405, 13215

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: -11001110011111

Octal: -31637

Duodecimal: -7793

Hexadecimal: -339f

Square: 174636225

Square Root: 114.9565135170687

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

Expansion of e.g.f. exp(x·cos(2·x)). A381275

a(n) = number of steps to reach 0 when starting from k = (n³)-1 and repeatedly applying the map that replaces k with k - A055401(k), where A055401(k) = the number of positive cubes needed to sum to k using the greedy algorithm. A261228

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays x(i,j) with row sums sum{x(i,j), j=1..k+1} nondecreasing, and column sums sum{i²*x(i,j), i=1..n+1} nondecreasing. A233374

Number T(n,k) of ways k L-tiles can be placed on an n X n square; triangle T(n,k), n>=0, 0<=k<=A229093(n), read by rows. A243608

a(n) = 2·a(n-1) + (-1)ⁿ*a(floor(n/2)); a(1)=1. A89067

Number of 3-element subsets of {1,...,n} whose sum has more than 3 divisors. A241564

a(n) = 529·n² - 2·n. A158364

Number of partitions of n containing at least one part m-10 if m is the largest part. A212550

Number of ways three L-tiles can be placed on an n X n square. A243646

Numbers n>1 such that the difference between log(n) and its best rational approximation as x/y with y<=n produces a new minimum of abs(log(n)-x/y). x/y is provided as A306976/A306977. A306975