51348223138 has 8 divisors (see below), whose sum is σ = 81553060332. Its totient is φ = 24163869696.

The previous prime is 51348223127. The next prime is 51348223193. The reversal of 51348223138 is 83132284315.

It can be written as a sum of positive squares in 2 ways, for example, as 50767750489 + 580472649 = 225317^2 + 24093^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 51348223138.

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, 755120895 + ... + 755120962.

Almost surely, 2^51348223138 is an apocalyptic number.

51348223138 is a deficient number, since it is larger than the sum of its proper divisors (30204837194).

51348223138 is a wasteful number, since it uses less digits than its factorization.

51348223138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510241876.

The product of its digits is 138240, while the sum is 40.

The spelling of 51348223138 in words is "fifty-one billion, three hundred forty-eight million, two hundred twenty-three thousand, one hundred thirty-eight".