51072188 has 6 divisors (see below), whose sum is σ = 89376336. Its totient is φ = 25536092.

The previous prime is 51072181. The next prime is 51072193. The reversal of 51072188 is 88127015.

It is a happy number.

51072188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51072181) 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 as a sum of consecutive naturals, namely, 6384020 + ... + 6384027.

It is an arithmetic number, because the mean of its divisors is an integer number (14896056).

Almost surely, 2^51072188 is an apocalyptic number.

It is an amenable number.

51072188 is a deficient number, since it is larger than the sum of its proper divisors (38304148).

51072188 is a wasteful number, since it uses less digits than its factorization.

51072188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12768051 (or 12768049 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 51072188 is about 7146.4808122600. The cubic root of 51072188 is about 371.0178644561.

The spelling of 51072188 in words is "fifty-one million, seventy-two thousand, one hundred eighty-eight".