181113226 has 8 divisors (see below), whose sum is σ = 310479840. Its totient is φ = 77619948.

The previous prime is 181113217. The next prime is 181113239. The reversal of 181113226 is 622311181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 181113226.

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 3 ways as a sum of consecutive naturals, for example, 6468316 + ... + 6468343.

It is an arithmetic number, because the mean of its divisors is an integer number (38809980).

Almost surely, 2^181113226 is an apocalyptic number.

181113226 is a deficient number, since it is larger than the sum of its proper divisors (129366614).

181113226 is a wasteful number, since it uses less digits than its factorization.

181113226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12936668.

The product of its digits is 576, while the sum is 25.

The square root of 181113226 is about 13457.8314003408. The cubic root of 181113226 is about 565.7832101452.

The spelling of 181113226 in words is "one hundred eighty-one million, one hundred thirteen thousand, two hundred twenty-six".