181365336 has 96 divisors (see below), whose sum is σ = 520182000. Its totient is φ = 56927232.

The previous prime is 181365323. The next prime is 181365341. The reversal of 181365336 is 633563181.

It is a happy number.

181365336 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 181365336.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 318460 + ... + 319028.

Almost surely, 2^181365336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181365336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260091000).

181365336 is an abundant number, since it is smaller than the sum of its proper divisors (338816664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181365336 is a wasteful number, since it uses less digits than its factorization.

181365336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833 (or 826 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 181365336 is about 13467.1948081254. The cubic root of 181365336 is about 566.0456122431.

The spelling of 181365336 in words is "one hundred eighty-one million, three hundred sixty-five thousand, three hundred thirty-six".