55205065 has 16 divisors (see below), whose sum is σ = 69155856. Its totient is φ = 42265600.

The previous prime is 55205057. The next prime is 55205071. The reversal of 55205065 is 56050255.

55205065 = 608² + 609² + ... + 730².

55205065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 10086976 + 45118089 = 3176^2 + 6717^2 .

It is not a de Polignac number, because 55205065 - 2³ = 55205057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8325 + ... + 13405.

It is an arithmetic number, because the mean of its divisors is an integer number (4322241).

Almost surely, 2^55205065 is an apocalyptic number.

It is an amenable number.

55205065 is a deficient number, since it is larger than the sum of its proper divisors (13950791).

55205065 is a wasteful number, since it uses less digits than its factorization.

55205065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5180.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 55205065 is about 7430.0111036256. The cubic root of 55205065 is about 380.7672977332.

It can be divided in two parts, 5520 and 5065, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 55205065 in words is "fifty-five million, two hundred five thousand, sixty-five".