51331235145504 has 48 divisors (see below), whose sum is σ = 134747264417472. Its totient is φ = 17110059694848.

The previous prime is 51331235145493. The next prime is 51331235145511. The reversal of 51331235145504 is 40554153213315.

51331235145504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

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, 788899 + ... + 10162914.

It is an arithmetic number, because the mean of its divisors is an integer number (2807234675364).

Almost surely, 2^{51331235145504} is an apocalyptic number.

It is an amenable number.

51331235145504 is an abundant number, since it is smaller than the sum of its proper divisors (83416029271968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51331235145504 is a wasteful number, since it uses less digits than its factorization.

51331235145504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11000649 (or 11000641 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 42.

Adding to 51331235145504 its reverse (40554153213315), we get a palindrome (91885388358819).

The spelling of 51331235145504 in words is "fifty-one trillion, three hundred thirty-one billion, two hundred thirty-five million, one hundred forty-five thousand, five hundred four".