55071609 has 16 divisors (see below), whose sum is σ = 76420800. Its totient is φ = 35233856.

The previous prime is 55071607. The next prime is 55071613. The reversal of 55071609 is 90617055.

55071609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55071609 - 2¹ = 55071607 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55071609.

It is not an unprimeable number, because it can be changed into a prime (55071607) 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 15 ways as a sum of consecutive naturals, for example, 13222 + ... + 16880.

It is an arithmetic number, because the mean of its divisors is an integer number (4776300).

Almost surely, 2^55071609 is an apocalyptic number.

It is an amenable number.

55071609 is a deficient number, since it is larger than the sum of its proper divisors (21349191).

55071609 is a wasteful number, since it uses less digits than its factorization.

55071609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3864.

The product of its (nonzero) digits is 9450, while the sum is 33.

The square root of 55071609 is about 7421.0247944607. The cubic root of 55071609 is about 380.4602203310.

The spelling of 55071609 in words is "fifty-five million, seventy-one thousand, six hundred nine".