22471 has 4 divisors (see below), whose sum is σ = 23472. Its totient is φ = 21472.

The previous prime is 22469. The next prime is 22481. The reversal of 22471 is 17422.

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 22471 - 2¹ = 22469 is a prime.

It is a super-3 number, since 3×22471³ = 34039913979333, which contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

22471 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22441) 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, 466 + ... + 511.

It is an arithmetic number, because the mean of its divisors is an integer number (5868).

2²²⁴⁷¹ is an apocalyptic number.

22471 is a deficient number, since it is larger than the sum of its proper divisors (1001).

22471 is an equidigital number, since it uses as much as digits as its factorization.

22471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000.

The product of its digits is 112, while the sum is 16.

The square root of 22471 is about 149.9033021651. The cubic root of 22471 is about 28.2189467429.

Adding to 22471 its reverse (17422), we get a palindrome (39893).

The spelling of 22471 in words is "twenty-two thousand, four hundred seventy-one", and thus it is an iban number.