22243747 has 4 divisors (see below), whose sum is σ = 22253400. Its totient is φ = 22234096.

The previous prime is 22243733. The next prime is 22243787. The reversal of 22243747 is 74734222.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22243747 - 2¹⁹ = 21719459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22243717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 879 + ... + 6727.

It is an arithmetic number, because the mean of its divisors is an integer number (5563350).

Almost surely, 2^22243747 is an apocalyptic number.

22243747 is a deficient number, since it is larger than the sum of its proper divisors (9653).

22243747 is an equidigital number, since it uses as much as digits as its factorization.

22243747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9652.

The product of its digits is 18816, while the sum is 31.

The square root of 22243747 is about 4716.3277027789. The cubic root of 22243747 is about 281.2349659783.

Adding to 22243747 its reverse (74734222), we get a palindrome (96977969).

The spelling of 22243747 in words is "twenty-two million, two hundred forty-three thousand, seven hundred forty-seven".