33191 has 2 divisors, whose sum is σ = 33192. Its totient is φ = 33190.

The previous prime is 33181. The next prime is 33199. The reversal of 33191 is 19133.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33191 is a prime.

It is a super-2 number, since 2×33191² = 2203284962, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16595 + 16596.

It is an arithmetic number, because the mean of its divisors is an integer number (16596).

2³³¹⁹¹ is an apocalyptic number.

33191 is a deficient number, since it is larger than the sum of its proper divisors (1).

33191 is an equidigital number, since it uses as much as digits as its factorization.

33191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81, while the sum is 17.

The square root of 33191 is about 182.1839729504. The cubic root of 33191 is about 32.1371070255.

The spelling of 33191 in words is "thirty-three thousand, one hundred ninety-one".