551243455123 has 2 divisors, whose sum is σ = 551243455124. Its totient is φ = 551243455122.

The previous prime is 551243455117. The next prime is 551243455201. The reversal of 551243455123 is 321554342155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 551243455123 - 2²⁵ = 551209900691 is a prime.

It is not a weakly prime, because it can be changed into another prime (551243450123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275621727561 + 275621727562.

It is an arithmetic number, because the mean of its divisors is an integer number (275621727562).

Almost surely, 2^551243455123 is an apocalyptic number.

551243455123 is a deficient number, since it is larger than the sum of its proper divisors (1).

551243455123 is an equidigital number, since it uses as much as digits as its factorization.

551243455123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360000, while the sum is 40.

Adding to 551243455123 its reverse (321554342155), we get a palindrome (872797797278).

The spelling of 551243455123 in words is "five hundred fifty-one billion, two hundred forty-three million, four hundred fifty-five thousand, one hundred twenty-three".