52554431521 has 2 divisors, whose sum is σ = 52554431522. Its totient is φ = 52554431520.

The previous prime is 52554431459. The next prime is 52554431557. The reversal of 52554431521 is 12513445525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52093041121 + 461390400 = 228239^2 + 21480^2 .

It is a cyclic number.

It is not a de Polignac number, because 52554431521 - 2⁹ = 52554431009 is a prime.

It is not a weakly prime, because it can be changed into another prime (52554431581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26277215760 + 26277215761.

It is an arithmetic number, because the mean of its divisors is an integer number (26277215761).

Almost surely, 2^52554431521 is an apocalyptic number.

It is an amenable number.

52554431521 is a deficient number, since it is larger than the sum of its proper divisors (1).

52554431521 is an equidigital number, since it uses as much as digits as its factorization.

52554431521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120000, while the sum is 37.

The spelling of 52554431521 in words is "fifty-two billion, five hundred fifty-four million, four hundred thirty-one thousand, five hundred twenty-one".