51155434013 has 2 divisors, whose sum is σ = 51155434014. Its totient is φ = 51155434012.

The previous prime is 51155434003. The next prime is 51155434037. The reversal of 51155434013 is 31043455115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50695674649 + 459759364 = 225157^2 + 21442^2 .

It is a cyclic number.

It is not a de Polignac number, because 51155434013 - 2¹⁴ = 51155417629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51155434003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25577717006 + 25577717007.

It is an arithmetic number, because the mean of its divisors is an integer number (25577717007).

Almost surely, 2^51155434013 is an apocalyptic number.

It is an amenable number.

51155434013 is a deficient number, since it is larger than the sum of its proper divisors (1).

51155434013 is an equidigital number, since it uses as much as digits as its factorization.

51155434013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 51155434013 its reverse (31043455115), we get a palindrome (82198889128).

The spelling of 51155434013 in words is "fifty-one billion, one hundred fifty-five million, four hundred thirty-four thousand, thirteen".