22123361 has 8 divisors (see below), whose sum is σ = 23866920. Its totient is φ = 20385792.

The previous prime is 22123351. The next prime is 22123393. The reversal of 22123361 is 16332122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4950625 + 17172736 = 2225^2 + 4144^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22123361 - 2²² = 17929057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22123351) 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 7 ways as a sum of consecutive naturals, for example, 8891 + ... + 11103.

It is an arithmetic number, because the mean of its divisors is an integer number (2983365).

Almost surely, 2^22123361 is an apocalyptic number.

It is an amenable number.

22123361 is a deficient number, since it is larger than the sum of its proper divisors (1743559).

22123361 is a wasteful number, since it uses less digits than its factorization.

22123361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2995.

The product of its digits is 432, while the sum is 20.

The square root of 22123361 is about 4703.5477035957. The cubic root of 22123361 is about 280.7266880646.

Adding to 22123361 its reverse (16332122), we get a palindrome (38455483).

The spelling of 22123361 in words is "twenty-two million, one hundred twenty-three thousand, three hundred sixty-one".