51438312 has 48 divisors (see below), whose sum is σ = 141404640. Its totient is φ = 16888608.

The previous prime is 51438287. The next prime is 51438319. The reversal of 51438312 is 21383415.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51438319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 508 + ... + 10155.

It is an arithmetic number, because the mean of its divisors is an integer number (2945930).

Almost surely, 2^51438312 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 51438312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70702320).

51438312 is an abundant number, since it is smaller than the sum of its proper divisors (89966328).

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

51438312 is a wasteful number, since it uses less digits than its factorization.

51438312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10742 (or 10735 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 51438312 is about 7172.0507527485. The cubic root of 51438312 is about 371.9023330144.

The spelling of 51438312 in words is "fifty-one million, four hundred thirty-eight thousand, three hundred twelve".