55005647 has 4 divisors (see below), whose sum is σ = 55038216. Its totient is φ = 54973080.

The previous prime is 55005631. The next prime is 55005653. The reversal of 55005647 is 74650055.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74650055 = 5 ⋅14930011.

It is a cyclic number.

It is not a de Polignac number, because 55005647 - 2⁴ = 55005631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55005667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13604 + ... + 17177.

It is an arithmetic number, because the mean of its divisors is an integer number (13759554).

Almost surely, 2^55005647 is an apocalyptic number.

55005647 is a deficient number, since it is larger than the sum of its proper divisors (32569).

55005647 is a wasteful number, since it uses less digits than its factorization.

55005647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32568.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 55005647 is about 7416.5791979861. The cubic root of 55005647 is about 380.3082609474.

The spelling of 55005647 in words is "fifty-five million, five thousand, six hundred forty-seven".