51631045420013 has 2 divisors, whose sum is σ = 51631045420014. Its totient is φ = 51631045420012.

The previous prime is 51631045419977. The next prime is 51631045420057. The reversal of 51631045420013 is 31002454013615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50881943052964 + 749102367049 = 7133158^2 + 865507^2 .

It is a cyclic number.

It is not a de Polignac number, because 51631045420013 - 2¹⁰ = 51631045418989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51631045420313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25815522710006 + 25815522710007.

It is an arithmetic number, because the mean of its divisors is an integer number (25815522710007).

Almost surely, 2^{51631045420013} is an apocalyptic number.

It is an amenable number.

51631045420013 is a deficient number, since it is larger than the sum of its proper divisors (1).

51631045420013 is an equidigital number, since it uses as much as digits as its factorization.

51631045420013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 51631045420013 its reverse (31002454013615), we get a palindrome (82633499433628).

The spelling of 51631045420013 in words is "fifty-one trillion, six hundred thirty-one billion, forty-five million, four hundred twenty thousand, thirteen".