22240423 has 6 divisors (see below), whose sum is σ = 22981992. Its totient is φ = 21522060.

The previous prime is 22240397. The next prime is 22240429. The reversal of 22240423 is 32404222.

It is not a de Polignac number, because 22240423 - 2⁵ = 22240391 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 22240423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22240429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10611 + ... + 12532.

It is an arithmetic number, because the mean of its divisors is an integer number (3830332).

Almost surely, 2^22240423 is an apocalyptic number.

22240423 is a deficient number, since it is larger than the sum of its proper divisors (741569).

22240423 is an equidigital number, since it uses as much as digits as its factorization.

22240423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23205 (or 23174 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 22240423 is about 4715.9752967970. The cubic root of 22240423 is about 281.2209564741.

Adding to 22240423 its reverse (32404222), we get a palindrome (54644645).

The spelling of 22240423 in words is "twenty-two million, two hundred forty thousand, four hundred twenty-three".