181135196 has 24 divisors (see below), whose sum is σ = 347575536. Its totient is φ = 81912320.

The previous prime is 181135193. The next prime is 181135249. The reversal of 181135196 is 691531181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181135193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1781 + ... + 19116.

It is an arithmetic number, because the mean of its divisors is an integer number (14482314).

Almost surely, 2^181135196 is an apocalyptic number.

It is an amenable number.

181135196 is a deficient number, since it is larger than the sum of its proper divisors (166440340).

181135196 is a wasteful number, since it uses less digits than its factorization.

181135196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21109 (or 21107 counting only the distinct ones).

The product of its digits is 6480, while the sum is 35.

The square root of 181135196 is about 13458.6476289410. The cubic root of 181135196 is about 565.8060867269.

The spelling of 181135196 in words is "one hundred eighty-one million, one hundred thirty-five thousand, one hundred ninety-six".