51530205593 has 2 divisors, whose sum is σ = 51530205594. Its totient is φ = 51530205592.

The previous prime is 51530205581. The next prime is 51530205613. The reversal of 51530205593 is 39550203515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48271165849 + 3259039744 = 219707^2 + 57088^2 .

It is a cyclic number.

It is not a de Polignac number, because 51530205593 - 2¹⁴ = 51530189209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51530205523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25765102796 + 25765102797.

It is an arithmetic number, because the mean of its divisors is an integer number (25765102797).

Almost surely, 2^51530205593 is an apocalyptic number.

It is an amenable number.

51530205593 is a deficient number, since it is larger than the sum of its proper divisors (1).

51530205593 is an equidigital number, since it uses as much as digits as its factorization.

51530205593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 101250, while the sum is 38.

The spelling of 51530205593 in words is "fifty-one billion, five hundred thirty million, two hundred five thousand, five hundred ninety-three".