181312706 has 16 divisors (see below), whose sum is σ = 288116160. Its totient is φ = 85335120.

The previous prime is 181312697. The next prime is 181312711. The reversal of 181312706 is 607213181.

181312706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9230 + ... + 21161.

It is an arithmetic number, because the mean of its divisors is an integer number (18007260).

Almost surely, 2^181312706 is an apocalyptic number.

181312706 is a deficient number, since it is larger than the sum of its proper divisors (106803454).

181312706 is a wasteful number, since it uses less digits than its factorization.

181312706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30569.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 181312706 is about 13465.2406588223. The cubic root of 181312706 is about 565.9908537772.

Adding to 181312706 its reverse (607213181), we get a palindrome (788525887).

The spelling of 181312706 in words is "one hundred eighty-one million, three hundred twelve thousand, seven hundred six".