51086353327421 has 2 divisors, whose sum is σ = 51086353327422. Its totient is φ = 51086353327420.

The previous prime is 51086353327379. The next prime is 51086353327433. The reversal of 51086353327421 is 12472335368015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46484101305625 + 4602252021796 = 6817925^2 + 2145286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51086353327421 is a prime.

It is a super-2 number, since 2×51086353327421² (a number of 28 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 51086353327421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51086323327421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25543176663710 + 25543176663711.

It is an arithmetic number, because the mean of its divisors is an integer number (25543176663711).

Almost surely, 2^{51086353327421} is an apocalyptic number.

It is an amenable number.

51086353327421 is a deficient number, since it is larger than the sum of its proper divisors (1).

51086353327421 is an equidigital number, since it uses as much as digits as its factorization.

51086353327421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3628800, while the sum is 50.

The spelling of 51086353327421 in words is "fifty-one trillion, eighty-six billion, three hundred fifty-three million, three hundred twenty-seven thousand, four hundred twenty-one".