51993313048321 has 4 divisors (see below), whose sum is σ = 55051743227652. Its totient is φ = 48934882868992.

The previous prime is 51993313048319. The next prime is 51993313048363. The reversal of 51993313048321 is 12384031339915.

It is a happy number.

51993313048321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22489513620721 + 29503799427600 = 4742311^2 + 5431740^2 .

It is a cyclic number.

It is not a de Polignac number, because 51993313048321 - 2¹ = 51993313048319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51993313048381) 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 3 ways as a sum of consecutive naturals, for example, 1529215089640 + ... + 1529215089673.

It is an arithmetic number, because the mean of its divisors is an integer number (13762935806913).

Almost surely, 2^{51993313048321} is an apocalyptic number.

It is an amenable number.

51993313048321 is a deficient number, since it is larger than the sum of its proper divisors (3058430179331).

51993313048321 is a wasteful number, since it uses less digits than its factorization.

51993313048321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3058430179330.

The product of its (nonzero) digits is 2099520, while the sum is 52.

The spelling of 51993313048321 in words is "fifty-one trillion, nine hundred ninety-three billion, three hundred thirteen million, forty-eight thousand, three hundred twenty-one".