55144905 has 8 divisors (see below), whose sum is σ = 88231872. Its totient is φ = 29410608.

The previous prime is 55144891. The next prime is 55144907. The reversal of 55144905 is 50944155.

55144905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55144905 - 2⁶ = 55144841 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55144907) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1838149 + ... + 1838178.

It is an arithmetic number, because the mean of its divisors is an integer number (11028984).

Almost surely, 2^55144905 is an apocalyptic number.

It is an amenable number.

55144905 is a deficient number, since it is larger than the sum of its proper divisors (33086967).

55144905 is a wasteful number, since it uses less digits than its factorization.

55144905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3676335.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 55144905 is about 7425.9615538999. The cubic root of 55144905 is about 380.6289330942.

The spelling of 55144905 in words is "fifty-five million, one hundred forty-four thousand, nine hundred five".