51688180 has 24 divisors (see below), whose sum is σ = 108692640. Its totient is φ = 20647200.

The previous prime is 51688157. The next prime is 51688187. The reversal of 51688180 is 8188615.

51688180 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 (51688187) 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, 19791 + ... + 22249.

It is an arithmetic number, because the mean of its divisors is an integer number (4528860).

Almost surely, 2^51688180 is an apocalyptic number.

It is an amenable number.

51688180 is an abundant number, since it is smaller than the sum of its proper divisors (57004460).

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

51688180 is a wasteful number, since it uses less digits than its factorization.

51688180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3519 (or 3517 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 37.

The square root of 51688180 is about 7189.4492139523. The cubic root of 51688180 is about 372.5035478544.

It can be divided in two parts, 516881 and 80, that added together give a square (516961 = 719²).

The spelling of 51688180 in words is "fifty-one million, six hundred eighty-eight thousand, one hundred eighty".