55571 has 4 divisors (see below), whose sum is σ = 56544. Its totient is φ = 54600.

The previous prime is 55547. The next prime is 55579. The reversal of 55571 is 17555.

55571 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, and also an emirpimes, since its reverse is a distinct semiprime: 17555 = 5 ⋅3511.

It is a cyclic number.

It is not a de Polignac number, because 55571 - 2¹⁰ = 54547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55579) 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, 395 + ... + 516.

It is an arithmetic number, because the mean of its divisors is an integer number (14136).

2⁵⁵⁵⁷¹ is an apocalyptic number.

55571 is a deficient number, since it is larger than the sum of its proper divisors (973).

55571 is an equidigital number, since it uses as much as digits as its factorization.

55571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972.

The product of its digits is 875, while the sum is 23.

The square root of 55571 is about 235.7350207330. The cubic root of 55571 is about 38.1606769859.

It can be divided in two parts, 555 and 71, that added together give a palindrome (626).

The spelling of 55571 in words is "fifty-five thousand, five hundred seventy-one".