51345000344321 has 4 divisors (see below), whose sum is σ = 51345015754500. Its totient is φ = 51344984934144.

The previous prime is 51345000344311. The next prime is 51345000344327. The reversal of 51345000344321 is 12344300054315.

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 17781064897600 + 33563935446721 = 4216760^2 + 5793439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51345000344321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51345000344327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396296 + ... + 10141353.

It is an arithmetic number, because the mean of its divisors is an integer number (12836253938625).

Almost surely, 2^{51345000344321} is an apocalyptic number.

It is an amenable number.

51345000344321 is a deficient number, since it is larger than the sum of its proper divisors (15410179).

51345000344321 is a wasteful number, since it uses less digits than its factorization.

51345000344321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15410178.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 51345000344321 its reverse (12344300054315), we get a palindrome (63689300398636).

The spelling of 51345000344321 in words is "fifty-one trillion, three hundred forty-five billion, three hundred forty-four thousand, three hundred twenty-one".