55647571 has 4 divisors (see below), whose sum is σ = 63597232. Its totient is φ = 47697912.

The previous prime is 55647533. The next prime is 55647589. The reversal of 55647571 is 17574655.

It is a happy number.

55647571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55647571 - 2¹¹ = 55645523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55647271) 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 3 ways as a sum of consecutive naturals, for example, 3974820 + ... + 3974833.

It is an arithmetic number, because the mean of its divisors is an integer number (15899308).

Almost surely, 2^55647571 is an apocalyptic number.

55647571 is a deficient number, since it is larger than the sum of its proper divisors (7949661).

55647571 is an equidigital number, since it uses as much as digits as its factorization.

55647571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7949660.

The product of its digits is 147000, while the sum is 40.

The square root of 55647571 is about 7459.7299548978. The cubic root of 55647571 is about 381.7819607655.

The spelling of 55647571 in words is "fifty-five million, six hundred forty-seven thousand, five hundred seventy-one".