51215752 has 32 divisors (see below), whose sum is σ = 112305600. Its totient is φ = 21438144.

The previous prime is 51215737. The next prime is 51215753. The reversal of 51215752 is 25751215.

51215752 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 51215752.

It is not an unprimeable number, because it can be changed into a prime (51215753) 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 7 ways as a sum of consecutive naturals, for example, 8227 + ... + 13042.

It is an arithmetic number, because the mean of its divisors is an integer number (3509550).

Almost surely, 2^51215752 is an apocalyptic number.

It is an amenable number.

51215752 is an abundant number, since it is smaller than the sum of its proper divisors (61089848).

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

51215752 is a wasteful number, since it uses less digits than its factorization.

51215752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21325 (or 21321 counting only the distinct ones).

The product of its digits is 3500, while the sum is 28.

The square root of 51215752 is about 7156.5181478146. The cubic root of 51215752 is about 371.3651831529.

Adding to 51215752 its reverse (25751215), we get a palindrome (76966967).

The spelling of 51215752 in words is "fifty-one million, two hundred fifteen thousand, seven hundred fifty-two".