23220305 has 4 divisors (see below), whose sum is σ = 27864372. Its totient is φ = 18576240.

The previous prime is 23220289. The next prime is 23220313. The reversal of 23220305 is 50302232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18524416 + 4695889 = 4304^2 + 2167^2 .

It is not a de Polignac number, because 23220305 - 2⁴ = 23220289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2322026 + ... + 2322035.

It is an arithmetic number, because the mean of its divisors is an integer number (6966093).

Almost surely, 2^23220305 is an apocalyptic number.

It is an amenable number.

23220305 is a deficient number, since it is larger than the sum of its proper divisors (4644067).

23220305 is an equidigital number, since it uses as much as digits as its factorization.

23220305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4644066.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 23220305 is about 4818.7451686098. The cubic root of 23220305 is about 285.2918115052.

Adding to 23220305 its reverse (50302232), we get a palindrome (73522537).

The spelling of 23220305 in words is "twenty-three million, two hundred twenty thousand, three hundred five".