51688110 has 16 divisors (see below), whose sum is σ = 124051536. Its totient is φ = 13783488.

The previous prime is 51688103. The next prime is 51688139. The reversal of 51688110 is 1188615.

It is a happy number.

51688110 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 (30), and also a Moran number because the ratio is a prime number: 1722937 = 51688110 / (5 + 1 + 6 + 8 + 8 + 1 + 1 + 0).

It is a congruent number.

It is an unprimeable number.

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, 861439 + ... + 861498.

It is an arithmetic number, because the mean of its divisors is an integer number (7753221).

Almost surely, 2^51688110 is an apocalyptic number.

51688110 is an abundant number, since it is smaller than the sum of its proper divisors (72363426).

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

51688110 is a wasteful number, since it uses less digits than its factorization.

51688110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722947.

The product of its (nonzero) digits is 1920, while the sum is 30.

The square root of 51688110 is about 7189.4443457057. Note that the first 3 decimals coincide. The cubic root of 51688110 is about 372.5033796970.

The spelling of 51688110 in words is "fifty-one million, six hundred eighty-eight thousand, one hundred ten".