22122723 has 16 divisors (see below), whose sum is σ = 34174976. Its totient is φ = 12467520.

The previous prime is 22122719. The next prime is 22122731. The reversal of 22122723 is 32722122.

It is a happy number.

It is not a de Polignac number, because 22122723 - 2² = 22122719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 22122723.

It is not an unprimeable number, because it can be changed into a prime (22122703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5683 + ... + 8748.

It is an arithmetic number, because the mean of its divisors is an integer number (2135936).

Almost surely, 2^22122723 is an apocalyptic number.

22122723 is a deficient number, since it is larger than the sum of its proper divisors (12052253).

22122723 is a wasteful number, since it uses less digits than its factorization.

22122723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14514.

The product of its digits is 672, while the sum is 21.

The square root of 22122723 is about 4703.4798819597. The cubic root of 22122723 is about 280.7239894790.

Adding to 22122723 its reverse (32722122), we get a palindrome (54844845).

The spelling of 22122723 in words is "twenty-two million, one hundred twenty-two thousand, seven hundred twenty-three".