51550442123 has 2 divisors, whose sum is σ = 51550442124. Its totient is φ = 51550442122.

The previous prime is 51550442107. The next prime is 51550442267. The reversal of 51550442123 is 32124405515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51550442123 - 2⁴ = 51550442107 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51550442123.

It is not a weakly prime, because it can be changed into another prime (51550442023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25775221061 + 25775221062.

It is an arithmetic number, because the mean of its divisors is an integer number (25775221062).

Almost surely, 2^51550442123 is an apocalyptic number.

51550442123 is a deficient number, since it is larger than the sum of its proper divisors (1).

51550442123 is an equidigital number, since it uses as much as digits as its factorization.

51550442123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 51550442123 its reverse (32124405515), we get a palindrome (83674847638).

The spelling of 51550442123 in words is "fifty-one billion, five hundred fifty million, four hundred forty-two thousand, one hundred twenty-three".