133505185 has 16 divisors (see below), whose sum is σ = 175032000. Its totient is φ = 96949440.

The previous prime is 133505173. The next prime is 133505227. The reversal of 133505185 is 581505331.

It is a de Polignac number, because none of the positive numbers 2^k-133505185 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47191 + ... + 49939.

It is an arithmetic number, because the mean of its divisors is an integer number (10939500).

Almost surely, 2^133505185 is an apocalyptic number.

It is an amenable number.

133505185 is a deficient number, since it is larger than the sum of its proper divisors (41526815).

133505185 is a wasteful number, since it uses less digits than its factorization.

133505185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3648.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 133505185 is about 11554.4443830069. Note that the first 3 decimals coincide. The cubic root of 133505185 is about 511.0923466208.

The spelling of 133505185 in words is "one hundred thirty-three million, five hundred five thousand, one hundred eighty-five".