51234210320281 has 2 divisors, whose sum is σ = 51234210320282. Its totient is φ = 51234210320280.

The previous prime is 51234210320257. The next prime is 51234210320287. The reversal of 51234210320281 is 18202301243215.

51234210320281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49738334556681 + 1495875763600 = 7052541^2 + 1223060^2 .

It is a cyclic number.

It is not a de Polignac number, because 51234210320281 - 2²⁹ = 51233673449369 is a prime.

It is a super-2 number, since 2×51234210320281² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51234210320287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25617105160140 + 25617105160141.

It is an arithmetic number, because the mean of its divisors is an integer number (25617105160141).

Almost surely, 2^{51234210320281} is an apocalyptic number.

It is an amenable number.

51234210320281 is a deficient number, since it is larger than the sum of its proper divisors (1).

51234210320281 is an equidigital number, since it uses as much as digits as its factorization.

51234210320281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 34.

Adding to 51234210320281 its reverse (18202301243215), we get a palindrome (69436511563496).

The spelling of 51234210320281 in words is "fifty-one trillion, two hundred thirty-four billion, two hundred ten million, three hundred twenty thousand, two hundred eighty-one".