23160209 has 4 divisors (see below), whose sum is σ = 23389620. Its totient is φ = 22930800.

The previous prime is 23160197. The next prime is 23160223. The reversal of 23160209 is 90206132.

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 9859600 + 13300609 = 3140^2 + 3647^2 .

It is a cyclic number.

It is not a de Polignac number, because 23160209 - 2⁸ = 23159953 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23160289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114554 + ... + 114755.

It is an arithmetic number, because the mean of its divisors is an integer number (5847405).

Almost surely, 2^23160209 is an apocalyptic number.

It is an amenable number.

23160209 is a deficient number, since it is larger than the sum of its proper divisors (229411).

23160209 is a wasteful number, since it uses less digits than its factorization.

23160209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229410.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 23160209 is about 4812.5054805164. The cubic root of 23160209 is about 285.0454795586.

The spelling of 23160209 in words is "twenty-three million, one hundred sixty thousand, two hundred nine".