51187444 has 48 divisors (see below), whose sum is σ = 117573120. Its totient is φ = 18891360.

The previous prime is 51187441. The next prime is 51187457. The reversal of 51187444 is 44478115.

It is a happy number.

51187444 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 (51187441) 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 15 ways as a sum of consecutive naturals, for example, 1479 + ... + 10225.

It is an arithmetic number, because the mean of its divisors is an integer number (2449440).

Almost surely, 2^51187444 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 51187444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58786560).

51187444 is an abundant number, since it is smaller than the sum of its proper divisors (66385676).

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

51187444 is a wasteful number, since it uses less digits than its factorization.

51187444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8788 (or 8786 counting only the distinct ones).

The product of its digits is 17920, while the sum is 34.

The square root of 51187444 is about 7154.5400970293. The cubic root of 51187444 is about 371.2967501504.

The spelling of 51187444 in words is "fifty-one million, one hundred eighty-seven thousand, four hundred forty-four".