51422352481 has 2 divisors, whose sum is σ = 51422352482. Its totient is φ = 51422352480.

The previous prime is 51422352473. The next prime is 51422352517. The reversal of 51422352481 is 18425322415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48259302400 + 3163050081 = 219680^2 + 56241^2 .

It is a cyclic number.

It is not a de Polignac number, because 51422352481 - 2³ = 51422352473 is a prime.

It is a super-2 number, since 2×51422352481² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51422352481.

It is not a weakly prime, because it can be changed into another prime (51422352781) 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, 25711176240 + 25711176241.

It is an arithmetic number, because the mean of its divisors is an integer number (25711176241).

Almost surely, 2^51422352481 is an apocalyptic number.

It is an amenable number.

51422352481 is a deficient number, since it is larger than the sum of its proper divisors (1).

51422352481 is an equidigital number, since it uses as much as digits as its factorization.

51422352481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76800, while the sum is 37.

Adding to 51422352481 its reverse (18425322415), we get a palindrome (69847674896).

The spelling of 51422352481 in words is "fifty-one billion, four hundred twenty-two million, three hundred fifty-two thousand, four hundred eighty-one".