51499878 has 8 divisors (see below), whose sum is σ = 102999768. Its totient is φ = 17166624.

The previous prime is 51499859. The next prime is 51499883. The reversal of 51499878 is 87899415.

51499878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

51499878 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 51499878.

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 3 ways as a sum of consecutive naturals, for example, 4291651 + ... + 4291662.

It is an arithmetic number, because the mean of its divisors is an integer number (12874971).

Almost surely, 2^51499878 is an apocalyptic number.

51499878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51499878 is a wasteful number, since it uses less digits than its factorization.

51499878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8583318.

The product of its digits is 725760, while the sum is 51.

The square root of 51499878 is about 7176.3415470559. The cubic root of 51499878 is about 372.0506492488.

The spelling of 51499878 in words is "fifty-one million, four hundred ninety-nine thousand, eight hundred seventy-eight".