51481271833 has 2 divisors, whose sum is σ = 51481271834. Its totient is φ = 51481271832.

The previous prime is 51481271827. The next prime is 51481271843. The reversal of 51481271833 is 33817218415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44397861264 + 7083410569 = 210708^2 + 84163^2 .

It is a cyclic number.

It is not a de Polignac number, because 51481271833 - 2⁹ = 51481271321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51481271833.

It is not a weakly prime, because it can be changed into another prime (51481271843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25740635916 + 25740635917.

It is an arithmetic number, because the mean of its divisors is an integer number (25740635917).

Almost surely, 2^51481271833 is an apocalyptic number.

It is an amenable number.

51481271833 is a deficient number, since it is larger than the sum of its proper divisors (1).

51481271833 is an equidigital number, since it uses as much as digits as its factorization.

51481271833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 43.

The spelling of 51481271833 in words is "fifty-one billion, four hundred eighty-one million, two hundred seventy-one thousand, eight hundred thirty-three".