22242723 has 4 divisors (see below), whose sum is σ = 29656968. Its totient is φ = 14828480.

The previous prime is 22242721. The next prime is 22242757. The reversal of 22242723 is 32724222.

It is a happy number.

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 22242723 - 2¹ = 22242721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22242693 and 22242702.

It is not an unprimeable number, because it can be changed into a prime (22242721) 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, 3707118 + ... + 3707123.

It is an arithmetic number, because the mean of its divisors is an integer number (7414242).

Almost surely, 2^22242723 is an apocalyptic number.

22242723 is a deficient number, since it is larger than the sum of its proper divisors (7414245).

22242723 is an equidigital number, since it uses as much as digits as its factorization.

22242723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7414244.

The product of its digits is 2688, while the sum is 24.

The square root of 22242723 is about 4716.2191424912. The cubic root of 22242723 is about 281.2306503231.

Adding to 22242723 its reverse (32724222), we get a palindrome (54966945).

The spelling of 22242723 in words is "twenty-two million, two hundred forty-two thousand, seven hundred twenty-three".