51755388 has 24 divisors (see below), whose sum is σ = 120887760. Its totient is φ = 17233920.

The previous prime is 51755381. The next prime is 51755419. The reversal of 51755388 is 88355715.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51755381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15378 + ... + 18438.

It is an arithmetic number, because the mean of its divisors is an integer number (5036990).

Almost surely, 2^51755388 is an apocalyptic number.

It is an amenable number.

51755388 is an abundant number, since it is smaller than the sum of its proper divisors (69132372).

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

51755388 is a wasteful number, since it uses less digits than its factorization.

51755388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4477 (or 4475 counting only the distinct ones).

The product of its digits is 168000, while the sum is 42.

The square root of 51755388 is about 7194.1217671096. The cubic root of 51755388 is about 372.6649282418.

The spelling of 51755388 in words is "fifty-one million, seven hundred fifty-five thousand, three hundred eighty-eight".