51303155564209 has 2 divisors, whose sum is σ = 51303155564210. Its totient is φ = 51303155564208.

The previous prime is 51303155564207. The next prime is 51303155564281. The reversal of 51303155564209 is 90246555130315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27488052839025 + 23815102725184 = 5242905^2 + 4880072^2 .

It is a cyclic number.

It is not a de Polignac number, because 51303155564209 - 2¹ = 51303155564207 is a prime.

Together with 51303155564207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51303155564207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25651577782104 + 25651577782105.

It is an arithmetic number, because the mean of its divisors is an integer number (25651577782105).

Almost surely, 2^{51303155564209} is an apocalyptic number.

It is an amenable number.

51303155564209 is a deficient number, since it is larger than the sum of its proper divisors (1).

51303155564209 is an equidigital number, since it uses as much as digits as its factorization.

51303155564209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430000, while the sum is 49.

The spelling of 51303155564209 in words is "fifty-one trillion, three hundred three billion, one hundred fifty-five million, five hundred sixty-four thousand, two hundred nine".