51351454555321 has 2 divisors, whose sum is σ = 51351454555322. Its totient is φ = 51351454555320.

The previous prime is 51351454555243. The next prime is 51351454555327. The reversal of 51351454555321 is 12355545415315.

51351454555321 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., 49772121964096 + 1579332591225 = 7054936^2 + 1256715^2 .

It is a cyclic number.

It is not a de Polignac number, because 51351454555321 - 2⁹ = 51351454554809 is a prime.

It is not a weakly prime, because it can be changed into another prime (51351454555327) 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, 25675727277660 + 25675727277661.

It is an arithmetic number, because the mean of its divisors is an integer number (25675727277661).

Almost surely, 2^{51351454555321} is an apocalyptic number.

It is an amenable number.

51351454555321 is a deficient number, since it is larger than the sum of its proper divisors (1).

51351454555321 is an equidigital number, since it uses as much as digits as its factorization.

51351454555321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4500000, while the sum is 49.

The spelling of 51351454555321 in words is "fifty-one trillion, three hundred fifty-one billion, four hundred fifty-four million, five hundred fifty-five thousand, three hundred twenty-one".