51912403847 has 2 divisors, whose sum is σ = 51912403848. Its totient is φ = 51912403846.

The previous prime is 51912403819. The next prime is 51912403853. The reversal of 51912403847 is 74830421915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51912403847 - 2⁶ = 51912403783 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51912403798 and 51912403807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51912403747) 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, 25956201923 + 25956201924.

It is an arithmetic number, because the mean of its divisors is an integer number (25956201924).

Almost surely, 2^51912403847 is an apocalyptic number.

51912403847 is a deficient number, since it is larger than the sum of its proper divisors (1).

51912403847 is an equidigital number, since it uses as much as digits as its factorization.

51912403847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 51912403847 in words is "fifty-one billion, nine hundred twelve million, four hundred three thousand, eight hundred forty-seven".