22647 has 4 divisors (see below), whose sum is σ = 30200. Its totient is φ = 15096.

The previous prime is 22643. The next prime is 22651. The reversal of 22647 is 74622.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (22643) and next prime (22651).

It is not a de Polignac number, because 22647 - 2² = 22643 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22643) 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, 3772 + ... + 3777.

It is an arithmetic number, because the mean of its divisors is an integer number (7550).

2²²⁶⁴⁷ is an apocalyptic number.

22647 is a deficient number, since it is larger than the sum of its proper divisors (7553).

22647 is an equidigital number, since it uses as much as digits as its factorization.

22647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7552.

The product of its digits is 672, while the sum is 21.

The square root of 22647 is about 150.4892022705. The cubic root of 22647 is about 28.2924284789.

The spelling of 22647 in words is "twenty-two thousand, six hundred forty-seven".