22287647 has 4 divisors (see below), whose sum is σ = 22538160. Its totient is φ = 22037136.

The previous prime is 22287623. The next prime is 22287659. The reversal of 22287647 is 74678222.

It is a happy number.

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 22287647 - 2²² = 18093343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22287647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22287607) 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, 125123 + ... + 125300.

It is an arithmetic number, because the mean of its divisors is an integer number (5634540).

Almost surely, 2^22287647 is an apocalyptic number.

22287647 is a deficient number, since it is larger than the sum of its proper divisors (250513).

22287647 is an equidigital number, since it uses as much as digits as its factorization.

22287647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250512.

The product of its digits is 75264, while the sum is 38.

The square root of 22287647 is about 4720.9794534609. The cubic root of 22287647 is about 281.4198584155.

The spelling of 22287647 in words is "twenty-two million, two hundred eighty-seven thousand, six hundred forty-seven".