22440323 has 4 divisors (see below), whose sum is σ = 23760360. Its totient is φ = 21120288.

The previous prime is 22440307. The next prime is 22440347. The reversal of 22440323 is 32304422.

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 22440323 - 2⁴ = 22440307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22440295 and 22440304.

It is not an unprimeable number, because it can be changed into a prime (22440623) 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, 659993 + ... + 660026.

It is an arithmetic number, because the mean of its divisors is an integer number (5940090).

Almost surely, 2^22440323 is an apocalyptic number.

22440323 is a deficient number, since it is larger than the sum of its proper divisors (1320037).

22440323 is a wasteful number, since it uses less digits than its factorization.

22440323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320036.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 22440323 is about 4737.1218054848. The cubic root of 22440323 is about 282.0609956418.

Adding to 22440323 its reverse (32304422), we get a palindrome (54744745).

The spelling of 22440323 in words is "twenty-two million, four hundred forty thousand, three hundred twenty-three".