51355448121349 has 2 divisors, whose sum is σ = 51355448121350. Its totient is φ = 51355448121348.

The previous prime is 51355448121127. The next prime is 51355448121353. The reversal of 51355448121349 is 94312184455315.

It is a happy number.

51355448121349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39648204209124 + 11707243912225 = 6296682^2 + 3421585^2 .

It is a cyclic number.

It is not a de Polignac number, because 51355448121349 - 2¹¹ = 51355448119301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51355448121349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51355478121349) 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, 25677724060674 + 25677724060675.

It is an arithmetic number, because the mean of its divisors is an integer number (25677724060675).

Almost surely, 2^{51355448121349} is an apocalyptic number.

It is an amenable number.

51355448121349 is a deficient number, since it is larger than the sum of its proper divisors (1).

51355448121349 is an equidigital number, since it uses as much as digits as its factorization.

51355448121349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368000, while the sum is 55.

The spelling of 51355448121349 in words is "fifty-one trillion, three hundred fifty-five billion, four hundred forty-eight million, one hundred twenty-one thousand, three hundred forty-nine".