22547 has 4 divisors (see below), whose sum is σ = 25776. Its totient is φ = 19320.

The previous prime is 22543. The next prime is 22549. The reversal of 22547 is 74522.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22547 - 2² = 22543 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 22547.

It is not an unprimeable number, because it can be changed into a prime (22541) 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, 1604 + ... + 1617.

It is an arithmetic number, because the mean of its divisors is an integer number (6444).

2²²⁵⁴⁷ is an apocalyptic number.

22547 is a deficient number, since it is larger than the sum of its proper divisors (3229).

22547 is an equidigital number, since it uses as much as digits as its factorization.

22547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3228.

The product of its digits is 560, while the sum is 20.

The square root of 22547 is about 150.1565849372. The cubic root of 22547 is about 28.2507243921.

It can be divided in two parts, 225 and 47, that added together give a palindrome (272).

The spelling of 22547 in words is "twenty-two thousand, five hundred forty-seven".