22571 has 2 divisors, whose sum is σ = 22572. Its totient is φ = 22570.

The previous prime is 22567. The next prime is 22573. The reversal of 22571 is 17522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22571 - 2² = 22567 is a prime.

Together with 22573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22573) 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 as a sum of consecutive naturals, namely, 11285 + 11286.

It is an arithmetic number, because the mean of its divisors is an integer number (11286).

2²²⁵⁷¹ is an apocalyptic number.

22571 is a deficient number, since it is larger than the sum of its proper divisors (1).

22571 is an equidigital number, since it uses as much as digits as its factorization.

22571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 140, while the sum is 17.

The square root of 22571 is about 150.2364802570. The cubic root of 22571 is about 28.2607446011.

The spelling of 22571 in words is "twenty-two thousand, five hundred seventy-one".