5051321432081 has 2 divisors, whose sum is σ = 5051321432082. Its totient is φ = 5051321432080.

The previous prime is 5051321432039. The next prime is 5051321432137. The reversal of 5051321432081 is 1802341231505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4904696769025 + 146624663056 = 2214655^2 + 382916^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5051321432081 is a prime.

It is a super-2 number, since 2×5051321432081² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5051321432021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2525660716040 + 2525660716041.

It is an arithmetic number, because the mean of its divisors is an integer number (2525660716041).

Almost surely, 2^{5051321432081} is an apocalyptic number.

It is an amenable number.

5051321432081 is a deficient number, since it is larger than the sum of its proper divisors (1).

5051321432081 is an equidigital number, since it uses as much as digits as its factorization.

5051321432081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 35.

Adding to 5051321432081 its reverse (1802341231505), we get a palindrome (6853662663586).

The spelling of 5051321432081 in words is "five trillion, fifty-one billion, three hundred twenty-one million, four hundred thirty-two thousand, eighty-one".