22243643 has 8 divisors (see below), whose sum is σ = 22790208. Its totient is φ = 21700224.

The previous prime is 22243631. The next prime is 22243657. The reversal of 22243643 is 34634222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22243643 - 2⁶ = 22243579 is a prime.

It is a super-2 number, since 2×22243643² = 989559307822898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22243673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19805 + ... + 20897.

It is an arithmetic number, because the mean of its divisors is an integer number (2848776).

Almost surely, 2^22243643 is an apocalyptic number.

22243643 is a deficient number, since it is larger than the sum of its proper divisors (546565).

22243643 is a wasteful number, since it uses less digits than its factorization.

22243643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573.

The product of its digits is 6912, while the sum is 26.

The square root of 22243643 is about 4716.3166772387. The cubic root of 22243643 is about 281.2345276756.

Adding to 22243643 its reverse (34634222), we get a palindrome (56877865).

The spelling of 22243643 in words is "twenty-two million, two hundred forty-three thousand, six hundred forty-three".