23205243 has 4 divisors (see below), whose sum is σ = 30940328. Its totient is φ = 15470160.

The previous prime is 23205239. The next prime is 23205269. The reversal of 23205243 is 34250232.

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

It is not a de Polignac number, because 23205243 - 2² = 23205239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23205233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3867538 + ... + 3867543.

It is an arithmetic number, because the mean of its divisors is an integer number (7735082).

Almost surely, 2^23205243 is an apocalyptic number.

23205243 is a deficient number, since it is larger than the sum of its proper divisors (7735085).

23205243 is an equidigital number, since it uses as much as digits as its factorization.

23205243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7735084.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 23205243 is about 4817.1820600845. The cubic root of 23205243 is about 285.2301127074.

Adding to 23205243 its reverse (34250232), we get a palindrome (57455475).

The spelling of 23205243 in words is "twenty-three million, two hundred five thousand, two hundred forty-three".