51321213053317 has 2 divisors, whose sum is σ = 51321213053318. Its totient is φ = 51321213053316.

The previous prime is 51321213053261. The next prime is 51321213053377. The reversal of 51321213053317 is 71335031212315.

51321213053317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35985013560001 + 15336199493316 = 5998751^2 + 3916146^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51321213053317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51321213053377) 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 as a sum of consecutive naturals, namely, 25660606526658 + 25660606526659.

It is an arithmetic number, because the mean of its divisors is an integer number (25660606526659).

Almost surely, 2^{51321213053317} is an apocalyptic number.

It is an amenable number.

51321213053317 is a deficient number, since it is larger than the sum of its proper divisors (1).

51321213053317 is an equidigital number, since it uses as much as digits as its factorization.

51321213053317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 37.

The spelling of 51321213053317 in words is "fifty-one trillion, three hundred twenty-one billion, two hundred thirteen million, fifty-three thousand, three hundred seventeen".