51312512 has 32 divisors (see below), whose sum is σ = 102632400. Its totient is φ = 25553920.

The previous prime is 51312497. The next prime is 51312551. The reversal of 51312512 is 21521315.

It is a happy number.

51312512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

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 3 ways as a sum of consecutive naturals, for example, 39164 + ... + 40452.

Almost surely, 2^51312512 is an apocalyptic number.

It is an amenable number.

51312512 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

51312512 is a wasteful number, since it uses less digits than its factorization.

51312512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614 (or 1602 counting only the distinct ones).

The product of its digits is 300, while the sum is 20.

The square root of 51312512 is about 7163.2752285529. The cubic root of 51312512 is about 371.5989047997.

Adding to 51312512 its reverse (21521315), we get a palindrome (72833827).

The spelling of 51312512 in words is "fifty-one million, three hundred twelve thousand, five hundred twelve".