51322032481 has 2 divisors, whose sum is σ = 51322032482. Its totient is φ = 51322032480.

The previous prime is 51322032403. The next prime is 51322032551. The reversal of 51322032481 is 18423022315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50516608081 + 805424400 = 224759^2 + 28380^2 .

It is a cyclic number.

It is not a de Polignac number, because 51322032481 - 2²³ = 51313643873 is a prime.

It is a super-2 number, since 2×51322032481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51329032481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25661016240 + 25661016241.

It is an arithmetic number, because the mean of its divisors is an integer number (25661016241).

Almost surely, 2^51322032481 is an apocalyptic number.

It is an amenable number.

51322032481 is a deficient number, since it is larger than the sum of its proper divisors (1).

51322032481 is an equidigital number, since it uses as much as digits as its factorization.

51322032481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 51322032481 its reverse (18423022315), we get a palindrome (69745054796).

The spelling of 51322032481 in words is "fifty-one billion, three hundred twenty-two million, thirty-two thousand, four hundred eighty-one".