181996195 has 16 divisors (see below), whose sum is σ = 226056960. Its totient is φ = 140515200.

The previous prime is 181996121. The next prime is 181996201. The reversal of 181996195 is 591699181.

It is not a de Polignac number, because 181996195 - 2⁹ = 181995683 is a prime.

It is a super-2 number, since 2×181996195² = 66245229988956050, which contains 22 as substring.

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, 63861 + ... + 66649.

It is an arithmetic number, because the mean of its divisors is an integer number (14128560).

Almost surely, 2^181996195 is an apocalyptic number.

181996195 is a deficient number, since it is larger than the sum of its proper divisors (44060765).

181996195 is a wasteful number, since it uses less digits than its factorization.

181996195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3246.

The product of its digits is 174960, while the sum is 49.

The square root of 181996195 is about 13490.5965398125. The cubic root of 181996195 is about 566.7011614911.

The spelling of 181996195 in words is "one hundred eighty-one million, nine hundred ninety-six thousand, one hundred ninety-five".