55211988447529 has 3 divisors (see below), whose sum is σ = 55211995878007. Its totient is φ = 55211981017052.

The previous prime is 55211988447461. The next prime is 55211988447541. The reversal of 55211988447529 is 92574488911255.

The square root of 55211988447529 is 7430477.

It is a perfect power (a square), and thus also a powerful number.

55211988447529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 46466649056025 + 8745339391504 = 6816645^2 + 2957252^2 .

It is not a de Polignac number, because 55211988447529 - 2⁷ = 55211988447401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55211988447569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3715239 + ... + 11145715.

Almost surely, 2^{55211988447529} is an apocalyptic number.

55211988447529 is the 7430477-th square number.

55211988447529 is the 3715239-th centered octagonal number.

It is an amenable number.

55211988447529 is a deficient number, since it is larger than the sum of its proper divisors (7430478).

55211988447529 is an frugal number, since it uses more digits than its factorization.

55211988447529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14860954 (or 7430477 counting only the distinct ones).

The product of its digits is 290304000, while the sum is 70.

The spelling of 55211988447529 in words is "fifty-five trillion, two hundred eleven billion, nine hundred eighty-eight million, four hundred forty-seven thousand, five hundred twenty-nine".