51329568 has 48 divisors (see below), whose sum is σ = 135305856. Its totient is φ = 17038080.

The previous prime is 51329563. The next prime is 51329627. The reversal of 51329568 is 86592315.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51329561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25030 + ... + 27002.

It is an arithmetic number, because the mean of its divisors is an integer number (2818872).

Almost surely, 2^51329568 is an apocalyptic number.

It is an amenable number.

51329568 is an abundant number, since it is smaller than the sum of its proper divisors (83976288).

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

51329568 is a wasteful number, since it uses less digits than its factorization.

51329568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257 (or 2249 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 51329568 is about 7164.4656465085. The cubic root of 51329568 is about 371.6400727239.

The spelling of 51329568 in words is "fifty-one million, three hundred twenty-nine thousand, five hundred sixty-eight".