55044145 has 12 divisors (see below), whose sum is σ = 71525916. Its totient is φ = 40647360.

The previous prime is 55044137. The next prime is 55044151. The reversal of 55044145 is 54144055.

55044145 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 6 ways, for example, as 1520289 + 53523856 = 1233^2 + 7316^2 .

It is not a de Polignac number, because 55044145 - 2³ = 55044137 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

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 11 ways as a sum of consecutive naturals, for example, 31726 + ... + 33415.

It is an arithmetic number, because the mean of its divisors is an integer number (5960493).

Almost surely, 2^55044145 is an apocalyptic number.

It is an amenable number.

55044145 is a deficient number, since it is larger than the sum of its proper divisors (16481771).

55044145 is a wasteful number, since it uses less digits than its factorization.

55044145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65172 (or 65159 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 55044145 is about 7419.1741454154. The cubic root of 55044145 is about 380.3969651310.

The spelling of 55044145 in words is "fifty-five million, forty-four thousand, one hundred forty-five".