51181112 has 32 divisors (see below), whose sum is σ = 97718400. Its totient is φ = 25127904.

The previous prime is 51181069. The next prime is 51181121. The reversal of 51181112 is 21118115.

51181112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 147323 + ... + 147669.

It is an arithmetic number, because the mean of its divisors is an integer number (3053700).

Almost surely, 2^51181112 is an apocalyptic number.

It is an amenable number.

51181112 is a deficient number, since it is larger than the sum of its proper divisors (46537288).

51181112 is a wasteful number, since it uses less digits than its factorization.

51181112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635 (or 631 counting only the distinct ones).

The product of its digits is 80, while the sum is 20.

The square root of 51181112 is about 7154.0975671289. The cubic root of 51181112 is about 371.2814394428.

Adding to 51181112 its reverse (21118115), we get a palindrome (72299227).

The spelling of 51181112 in words is "fifty-one million, one hundred eighty-one thousand, one hundred twelve".