22239643 has 16 divisors (see below), whose sum is σ = 24076800. Its totient is φ = 20490624.

The previous prime is 22239631. The next prime is 22239653. The reversal of 22239643 is 34693222.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22239643 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (22239653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111658 + ... + 111856.

It is an arithmetic number, because the mean of its divisors is an integer number (1504800).

Almost surely, 2^22239643 is an apocalyptic number.

22239643 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

22239643 is a deficient number, since it is larger than the sum of its proper divisors (1837157).

22239643 is a wasteful number, since it uses less digits than its factorization.

22239643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378.

The product of its digits is 15552, while the sum is 31.

The square root of 22239643 is about 4715.8925984378. The cubic root of 22239643 is about 281.2176688432.

The spelling of 22239643 in words is "twenty-two million, two hundred thirty-nine thousand, six hundred forty-three".