22523213 has 6 divisors (see below), whose sum is σ = 22902282. Its totient is φ = 22150320.

The previous prime is 22523209. The next prime is 22523219. The reversal of 22523213 is 31232522.

It can be written as a sum of positive squares in 3 ways, for example, as 4571044 + 17952169 = 2138^2 + 4237^2 .

It is not a de Polignac number, because 22523213 - 2² = 22523209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22523219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 695 + ... + 6747.

It is an arithmetic number, because the mean of its divisors is an integer number (3817047).

Almost surely, 2^22523213 is an apocalyptic number.

It is an amenable number.

22523213 is a deficient number, since it is larger than the sum of its proper divisors (379069).

22523213 is an frugal number, since it uses more digits than its factorization.

22523213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6175 (or 6114 counting only the distinct ones).

The product of its digits is 720, while the sum is 20.

The square root of 22523213 is about 4745.8627245212. The cubic root of 22523213 is about 282.4078609375.

Adding to 22523213 its reverse (31232522), we get a palindrome (53755735).

The spelling of 22523213 in words is "twenty-two million, five hundred twenty-three thousand, two hundred thirteen".