51355115085125 has 8 divisors (see below), whose sum is σ = 64091183626392. Its totient is φ = 41084092068000.

The previous prime is 51355115085047. The next prime is 51355115085161. The reversal of 51355115085125 is 52158051155315.

51355115085125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 236990791489 + 51118124293636 = 486817^2 + 7149694^2 .

It is not a de Polignac number, because 51355115085125 - 2¹⁶ = 51355115019589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51355115085125.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 205420460216 + ... + 205420460465.

It is an arithmetic number, because the mean of its divisors is an integer number (8011397953299).

Almost surely, 2^{51355115085125} is an apocalyptic number.

It is an amenable number.

51355115085125 is a deficient number, since it is larger than the sum of its proper divisors (12736068541267).

51355115085125 is an equidigital number, since it uses as much as digits as its factorization.

51355115085125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410840920696 (or 410840920686 counting only the distinct ones).

The product of its (nonzero) digits is 750000, while the sum is 47.

The spelling of 51355115085125 in words is "fifty-one trillion, three hundred fifty-five billion, one hundred fifteen million, eighty-five thousand, one hundred twenty-five".