515455522123 has 2 divisors, whose sum is σ = 515455522124. Its totient is φ = 515455522122.

The previous prime is 515455522081. The next prime is 515455522181. The reversal of 515455522123 is 321225554515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 515455522123 - 2²⁵ = 515421967691 is a prime.

It is not a weakly prime, because it can be changed into another prime (515450522123) 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, 257727761061 + 257727761062.

It is an arithmetic number, because the mean of its divisors is an integer number (257727761062).

Almost surely, 2^515455522123 is an apocalyptic number.

515455522123 is a deficient number, since it is larger than the sum of its proper divisors (1).

515455522123 is an equidigital number, since it uses as much as digits as its factorization.

515455522123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 300000, while the sum is 40.

The spelling of 515455522123 in words is "five hundred fifteen billion, four hundred fifty-five million, five hundred twenty-two thousand, one hundred twenty-three".