551243054123 has 2 divisors, whose sum is σ = 551243054124. Its totient is φ = 551243054122.

The previous prime is 551243054113. The next prime is 551243054143. The reversal of 551243054123 is 321450342155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 551243054123 - 2⁶ = 551243054059 is a prime.

It is not a weakly prime, because it can be changed into another prime (551243054113) 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, 275621527061 + 275621527062.

It is an arithmetic number, because the mean of its divisors is an integer number (275621527062).

Almost surely, 2^551243054123 is an apocalyptic number.

551243054123 is a deficient number, since it is larger than the sum of its proper divisors (1).

551243054123 is an equidigital number, since it uses as much as digits as its factorization.

551243054123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 551243054123 its reverse (321450342155), we get a palindrome (872693396278).

The spelling of 551243054123 in words is "five hundred fifty-one billion, two hundred forty-three million, fifty-four thousand, one hundred twenty-three".