51481271827 has 2 divisors, whose sum is σ = 51481271828. Its totient is φ = 51481271826.

The previous prime is 51481271731. The next prime is 51481271833. The reversal of 51481271827 is 72817218415.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51481271827 is a prime.

It is not a weakly prime, because it can be changed into another prime (51481271867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25740635913 + 25740635914.

It is an arithmetic number, because the mean of its divisors is an integer number (25740635914).

Almost surely, 2^51481271827 is an apocalyptic number.

51481271827 is a deficient number, since it is larger than the sum of its proper divisors (1).

51481271827 is an equidigital number, since it uses as much as digits as its factorization.

51481271827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250880, while the sum is 46.

The spelling of 51481271827 in words is "fifty-one billion, four hundred eighty-one million, two hundred seventy-one thousand, eight hundred twenty-seven".