51350611243381 has 2 divisors, whose sum is σ = 51350611243382. Its totient is φ = 51350611243380.

The previous prime is 51350611243307. The next prime is 51350611243409. The reversal of 51350611243381 is 18334211605315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32179865652900 + 19170745590481 = 5672730^2 + 4378441^2 .

It is a cyclic number.

It is not a de Polignac number, because 51350611243381 - 2¹¹ = 51350611241333 is a prime.

It is a super-2 number, since 2×51350611243381² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51350611243181) 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, 25675305621690 + 25675305621691.

It is an arithmetic number, because the mean of its divisors is an integer number (25675305621691).

Almost surely, 2^{51350611243381} is an apocalyptic number.

It is an amenable number.

51350611243381 is a deficient number, since it is larger than the sum of its proper divisors (1).

51350611243381 is an equidigital number, since it uses as much as digits as its factorization.

51350611243381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 43.

Adding to 51350611243381 its reverse (18334211605315), we get a palindrome (69684822848696).

The spelling of 51350611243381 in words is "fifty-one trillion, three hundred fifty billion, six hundred eleven million, two hundred forty-three thousand, three hundred eighty-one".