51812012 has 36 divisors (see below), whose sum is σ = 111033720. Its totient is φ = 21034944.

The previous prime is 51812011. The next prime is 51812017. The reversal of 51812012 is 21021815.

It is a happy number.

51812012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51812011) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 3233 + ... + 10680.

It is an arithmetic number, because the mean of its divisors is an integer number (3084270).

Almost surely, 2^51812012 is an apocalyptic number.

It is an amenable number.

51812012 is an abundant number, since it is smaller than the sum of its proper divisors (59221708).

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

51812012 is a wasteful number, since it uses less digits than its factorization.

51812012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13950 (or 13941 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 51812012 is about 7198.0561264830. The cubic root of 51812012 is about 372.8007858389.

Adding to 51812012 its reverse (21021815), we get a palindrome (72833827).

The spelling of 51812012 in words is "fifty-one million, eight hundred twelve thousand, twelve".