51538742 has 16 divisors (see below), whose sum is σ = 81334800. Its totient is φ = 24457440.

The previous prime is 51538741. The next prime is 51538777. The reversal of 51538742 is 24783515.

It is a happy number.

51538742 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 (51538741) 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 7 ways as a sum of consecutive naturals, for example, 4109 + ... + 10952.

It is an arithmetic number, because the mean of its divisors is an integer number (5083425).

Almost surely, 2^51538742 is an apocalyptic number.

51538742 is a deficient number, since it is larger than the sum of its proper divisors (29796058).

51538742 is a wasteful number, since it uses less digits than its factorization.

51538742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15151.

The product of its digits is 33600, while the sum is 35.

The square root of 51538742 is about 7179.0488227898. The cubic root of 51538742 is about 372.1442141354.

The spelling of 51538742 in words is "fifty-one million, five hundred thirty-eight thousand, seven hundred forty-two".