181122808 has 16 divisors (see below), whose sum is σ = 339939000. Its totient is φ = 90472416.

The previous prime is 181122791. The next prime is 181122857. The reversal of 181122808 is 808221181.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 181122808.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2038 + ... + 19141.

Almost surely, 2^181122808 is an apocalyptic number.

It is an amenable number.

181122808 is a deficient number, since it is larger than the sum of its proper divisors (158816192).

181122808 is a wasteful number, since it uses less digits than its factorization.

181122808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22254 (or 22250 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 31.

The square root of 181122808 is about 13458.1873965256. The cubic root of 181122808 is about 565.7931877694.

Adding to 181122808 its reverse (808221181), we get a palindrome (989343989).

The spelling of 181122808 in words is "one hundred eighty-one million, one hundred twenty-two thousand, eight hundred eight".