23571 has 12 divisors (see below), whose sum is σ = 35672. Its totient is φ = 15552.

The previous prime is 23567. The next prime is 23581. The reversal of 23571 is 17532.

It is not a de Polignac number, because 23571 - 2² = 23567 is a prime.

It is a Duffinian number.

23571 is a lucky number.

It is a plaindrome in base 11.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23531) 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 11 ways as a sum of consecutive naturals, for example, 195 + ... + 291.

2²³⁵⁷¹ is an apocalyptic number.

23571 is a deficient number, since it is larger than the sum of its proper divisors (12101).

23571 is an frugal number, since it uses more digits than its factorization.

23571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 100 counting only the distinct ones).

The product of its digits is 210, while the sum is 18.

The square root of 23571 is about 153.5284989831. The cubic root of 23571 is about 28.6720889929.

The spelling of 23571 in words is "twenty-three thousand, five hundred seventy-one".