51394538 has 16 divisors (see below), whose sum is σ = 83166720. Its totient is φ = 23679216.

The previous prime is 51394537. The next prime is 51394543. The reversal of 51394538 is 83549315.

It is a happy number.

51394538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51394537) 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, 17543 + ... + 20261.

It is an arithmetic number, because the mean of its divisors is an integer number (5197920).

Almost surely, 2^51394538 is an apocalyptic number.

51394538 is a deficient number, since it is larger than the sum of its proper divisors (31772182).

51394538 is a wasteful number, since it uses less digits than its factorization.

51394538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461.

The product of its digits is 64800, while the sum is 38.

The square root of 51394538 is about 7168.9983958709. The cubic root of 51394538 is about 371.7968067878.

The spelling of 51394538 in words is "fifty-one million, three hundred ninety-four thousand, five hundred thirty-eight".