23205211 has 4 divisors (see below), whose sum is σ = 23244424. Its totient is φ = 23166000.

The previous prime is 23205199. The next prime is 23205233. The reversal of 23205211 is 11250232.

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 23205211 - 2¹¹ = 23203163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23205271) 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, 18705 + ... + 19906.

It is an arithmetic number, because the mean of its divisors is an integer number (5811106).

Almost surely, 2^23205211 is an apocalyptic number.

23205211 is a deficient number, since it is larger than the sum of its proper divisors (39213).

23205211 is an equidigital number, since it uses as much as digits as its factorization.

23205211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39212.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 23205211 is about 4817.1787386395. The cubic root of 23205211 is about 285.2299815967.

Adding to 23205211 its reverse (11250232), we get a palindrome (34455443).

The spelling of 23205211 in words is "twenty-three million, two hundred five thousand, two hundred eleven".