51755021393 has 2 divisors, whose sum is σ = 51755021394. Its totient is φ = 51755021392.

The previous prime is 51755021371. The next prime is 51755021401. The reversal of 51755021393 is 39312055715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51750790144 + 4231249 = 227488^2 + 2057^2 .

It is a cyclic number.

It is not a de Polignac number, because 51755021393 - 2¹⁴ = 51755005009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51755021393.

It is not a weakly prime, because it can be changed into another prime (51755021333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25877510696 + 25877510697.

It is an arithmetic number, because the mean of its divisors is an integer number (25877510697).

Almost surely, 2^51755021393 is an apocalyptic number.

It is an amenable number.

51755021393 is a deficient number, since it is larger than the sum of its proper divisors (1).

51755021393 is an equidigital number, since it uses as much as digits as its factorization.

51755021393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141750, while the sum is 41.

The spelling of 51755021393 in words is "fifty-one billion, seven hundred fifty-five million, twenty-one thousand, three hundred ninety-three".