Properties of the Number 195

One Hundred Ninety-Five

Basics

Value: 194 → 195 → 196

Parity: odd

Prime: No

Previous Prime: 193

Next Prime: 197

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 13

Divisors: 1, 3, 5, 13, 15, 39, 65, 195

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11000011

Octal: 303

Duodecimal: 143

Hexadecimal: c3

Square: 38025

Square Root: 13.96424004376894

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

Toothpick sequence (see Comments lines for definition). A139250

a(n) = ∑_k=0..n p(k) where p(k) = number of partitions of k (A000041). A70

The squarefree numbers ordered lexicographically by their prime factorization (with factors written in decreasing order). a(n) = ∏_{k in I} prime(k+1), where I is the set of indices of nonzero binary digits in n = ∑_{k in I} 2^k. A19565

Niven (or Harshad, or harshad) numbers: numbers that are divisible by the sum of their digits. A5349

a(n) = n*(n+2) = (n+1)² - 1. A5563

Lucky numbers. A959

Numbers that are the product of exactly three (not necessarily distinct) primes. A14612

Binary palindromes: numbers whose binary expansion is palindromic. A6995

a(n) = 4·n + 3. A4767

Sphenic numbers: products of 3 distinct primes. A7304

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