7181

7181 is a natural number that comes after 7180 and before 7182. It is odd and composite.

Prime factorization: 7181 = 43 × 167, where 43 and 167 are primes. This makes 7181 a semiprime and, since the prime factors are distinct, a square-free number. The positive divisors of 7181 are 1, 43, 167, and 7181; thus it has four divisors (tau(7181) = 4). The sum of all divisors is sigma(7181) = (1+43)(1+167) = 7392, so the sum of proper divisors is 7392 − 7181 = 211. Because 211 < 7181, 7181 is a deficient number, not perfect or abundant.

Around representations: in base 2, 7181 is 1110000001101_2. Its decimal digits sum to 17, so it is not divisible by 3, and it is not divisible by 5 or 2.