51500020053 has 16 divisors (see below), whose sum is σ = 68844344256. Its totient is φ = 34244636160.

The previous prime is 51500020051. The next prime is 51500020109. The reversal of 51500020053 is 35002000515.

It is not a de Polignac number, because 51500020053 - 2¹ = 51500020051 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51500020051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1886326 + ... + 1913432.

It is an arithmetic number, because the mean of its divisors is an integer number (4302771516).

Almost surely, 2^51500020053 is an apocalyptic number.

It is an amenable number.

51500020053 is a deficient number, since it is larger than the sum of its proper divisors (17344324203).

51500020053 is a wasteful number, since it uses less digits than its factorization.

51500020053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28724.

The product of its (nonzero) digits is 750, while the sum is 21.

Adding to 51500020053 its reverse (35002000515), we get a palindrome (86502020568).

The spelling of 51500020053 in words is "fifty-one billion, five hundred million, twenty thousand, fifty-three".