51004042 has 8 divisors (see below), whose sum is σ = 76616100. Its totient is φ = 25465344.

The previous prime is 51004039. The next prime is 51004049. The reversal of 51004042 is 24040015.

It can be written as a sum of positive squares in 2 ways, for example, as 50851161 + 152881 = 7131^2 + 391^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (51004049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16567 + ... + 19402.

Almost surely, 2^51004042 is an apocalyptic number.

51004042 is a deficient number, since it is larger than the sum of its proper divisors (25612058).

51004042 is a wasteful number, since it uses less digits than its factorization.

51004042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36680.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 51004042 is about 7141.7114195408. The cubic root of 51004042 is about 370.8527737091.

Adding to 51004042 its reverse (24040015), we get a palindrome (75044057).

The spelling of 51004042 in words is "fifty-one million, four thousand, forty-two".