51564195223 has 2 divisors, whose sum is σ = 51564195224. Its totient is φ = 51564195222.

The previous prime is 51564195203. The next prime is 51564195227. The reversal of 51564195223 is 32259146515.

51564195223 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51564195223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51564195223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51564195227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25782097611 + 25782097612.

It is an arithmetic number, because the mean of its divisors is an integer number (25782097612).

Almost surely, 2^51564195223 is an apocalyptic number.

51564195223 is a deficient number, since it is larger than the sum of its proper divisors (1).

51564195223 is an equidigital number, since it uses as much as digits as its factorization.

51564195223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 43.

The spelling of 51564195223 in words is "fifty-one billion, five hundred sixty-four million, one hundred ninety-five thousand, two hundred twenty-three".