15552534121 has 2 divisors, whose sum is σ = 15552534122. Its totient is φ = 15552534120.

The previous prime is 15552534103. The next prime is 15552534199. The reversal of 15552534121 is 12143525551.

15552534121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11270794896 + 4281739225 = 106164^2 + 65435^2 .

It is a cyclic number.

It is not a de Polignac number, because 15552534121 - 2⁵ = 15552534089 is a prime.

It is not a weakly prime, because it can be changed into another prime (15552535121) 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, 7776267060 + 7776267061.

It is an arithmetic number, because the mean of its divisors is an integer number (7776267061).

Almost surely, 2^15552534121 is an apocalyptic number.

It is an amenable number.

15552534121 is a deficient number, since it is larger than the sum of its proper divisors (1).

15552534121 is an equidigital number, since it uses as much as digits as its factorization.

15552534121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30000, while the sum is 34.

The spelling of 15552534121 in words is "fifteen billion, five hundred fifty-two million, five hundred thirty-four thousand, one hundred twenty-one".