51300043121 has 2 divisors, whose sum is σ = 51300043122. Its totient is φ = 51300043120.

The previous prime is 51300043117. The next prime is 51300043159. The reversal of 51300043121 is 12134000315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40939856896 + 10360186225 = 202336^2 + 101785^2 .

It is a cyclic number.

It is not a de Polignac number, because 51300043121 - 2² = 51300043117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51300043093 and 51300043102.

It is not a weakly prime, because it can be changed into another prime (51300043181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25650021560 + 25650021561.

It is an arithmetic number, because the mean of its divisors is an integer number (25650021561).

Almost surely, 2^51300043121 is an apocalyptic number.

It is an amenable number.

51300043121 is a deficient number, since it is larger than the sum of its proper divisors (1).

51300043121 is an equidigital number, since it uses as much as digits as its factorization.

51300043121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 51300043121 its reverse (12134000315), we get a palindrome (63434043436).

The spelling of 51300043121 in words is "fifty-one billion, three hundred million, forty-three thousand, one hundred twenty-one".