53571 has 8 divisors (see below), whose sum is σ = 81664. Its totient is φ = 30600.

The previous prime is 53569. The next prime is 53591. The reversal of 53571 is 17535.

It is a happy number.

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

It is not a de Polignac number, because 53571 - 2¹ = 53569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 2551 = 53571 / (5 + 3 + 5 + 7 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1255 + ... + 1296.

It is an arithmetic number, because the mean of its divisors is an integer number (10208).

2⁵³⁵⁷¹ is an apocalyptic number.

53571 is a deficient number, since it is larger than the sum of its proper divisors (28093).

53571 is a wasteful number, since it uses less digits than its factorization.

53571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561.

The product of its digits is 525, while the sum is 21.

The square root of 53571 is about 231.4540991212. The cubic root of 53571 is about 37.6972715299.

It can be divided in two parts, 535 and 71, that added together give a palindrome (606).

The spelling of 53571 in words is "fifty-three thousand, five hundred seventy-one".