51504254042 has 8 divisors (see below), whose sum is σ = 79344391476. Its totient is φ = 25056123552.

The previous prime is 51504254033. The next prime is 51504254099. The reversal of 51504254042 is 24045240515.

It can be written as a sum of positive squares in 2 ways, for example, as 49275564361 + 2228689681 = 221981^2 + 47209^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348001643 + ... + 348001790.

Almost surely, 2^51504254042 is an apocalyptic number.

51504254042 is a deficient number, since it is larger than the sum of its proper divisors (27840137434).

51504254042 is a wasteful number, since it uses less digits than its factorization.

51504254042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696003472.

The product of its (nonzero) digits is 32000, while the sum is 32.

Adding to 51504254042 its reverse (24045240515), we get a palindrome (75549494557).

The spelling of 51504254042 in words is "fifty-one billion, five hundred four million, two hundred fifty-four thousand, forty-two".