51868464 has 40 divisors (see below), whose sum is σ = 135259200. Its totient is φ = 17126208.

The previous prime is 51868457. The next prime is 51868529. The reversal of 51868464 is 46486815.

51868464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 87 + ... + 10185.

It is an arithmetic number, because the mean of its divisors is an integer number (3381480).

Almost surely, 2^51868464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51868464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67629600).

51868464 is an abundant number, since it is smaller than the sum of its proper divisors (83390736).

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

51868464 is a wasteful number, since it uses less digits than its factorization.

51868464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10217 (or 10211 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

The square root of 51868464 is about 7201.9763954070. The cubic root of 51868464 is about 372.9361322604.

The spelling of 51868464 in words is "fifty-one million, eight hundred sixty-eight thousand, four hundred sixty-four".