51302718191 has 2 divisors, whose sum is σ = 51302718192. Its totient is φ = 51302718190.

The previous prime is 51302718161. The next prime is 51302718209. The reversal of 51302718191 is 19181720315.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51302718191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51302718161) 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, 25651359095 + 25651359096.

It is an arithmetic number, because the mean of its divisors is an integer number (25651359096).

Almost surely, 2^51302718191 is an apocalyptic number.

51302718191 is a deficient number, since it is larger than the sum of its proper divisors (1).

51302718191 is an equidigital number, since it uses as much as digits as its factorization.

51302718191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 38.

The spelling of 51302718191 in words is "fifty-one billion, three hundred two million, seven hundred eighteen thousand, one hundred ninety-one".