22205123 has 4 divisors (see below), whose sum is σ = 22226568. Its totient is φ = 22183680.

The previous prime is 22205119. The next prime is 22205137. The reversal of 22205123 is 32150222.

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 22205123 - 2² = 22205119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22205423) 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, 9086 + ... + 11267.

It is an arithmetic number, because the mean of its divisors is an integer number (5556642).

Almost surely, 2^22205123 is an apocalyptic number.

22205123 is a deficient number, since it is larger than the sum of its proper divisors (21445).

22205123 is a wasteful number, since it uses less digits than its factorization.

22205123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21444.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 22205123 is about 4712.2312124937. The cubic root of 22205123 is about 281.0720930510.

Adding to 22205123 its reverse (32150222), we get a palindrome (54355345).

The spelling of 22205123 in words is "twenty-two million, two hundred five thousand, one hundred twenty-three".