Properties of the Number 3195

Three Thousand One Hundred Ninety-Five

Basics

Value: 3194 → 3195 → 3196

Parity: odd

Prime: No

Previous Prime: 3191

Next Prime: 3203

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 71

Divisors: 1, 3, 5, 9, 15, 45, 71, 213, 355, 639

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110001111011

Octal: 6173

Duodecimal: 1A23

Hexadecimal: c7b

Square: 10208025

Square Root: 56.52433104425032

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 k such that k and k+1 have the same sum of unitary divisors (A034448). A64125

D-toothpick sequence of the third kind starting with a single toothpick. A220500

Numbers k such that bsigma(k) = bsigma(k+1), where bsigma(k) is the sum of the bi-unitary divisors of k (A188999). A293183

Numbers k such that isigma(k) = isigma(k+1), where isigma(k) is the sum of the infinitary divisors of k (A049417). A306985

a(n) is the solution to the postage stamp problem with n denominations and 4 stamps. A1214

a(n) = n*(7·n+3)/2. A186029

a(n) = (3/2)*a(n-1) if a(n-1) is even; (3/2)*(a(n-1)+1) if a(n-1) is odd. A70885

T(n,k)=Number of nXk arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 nXk array. A219852

Numbers k for which nontrivial positive magic squares of exactly 7 different orders with magic sum k exist. For a definition of nontrivial positive magic squares, see A125005. A125014

3 times 12-gonal (or dodecagonal) numbers: a(n) = 3·n*(5·n-4). A153448