23220209 has 8 divisors (see below), whose sum is σ = 24480768. Its totient is φ = 21991680.

The previous prime is 23220187. The next prime is 23220221. The reversal of 23220209 is 90202232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23220209 - 2²⁴ = 6442993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23220229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6512 + ... + 9425.

It is an arithmetic number, because the mean of its divisors is an integer number (3060096).

Almost surely, 2^23220209 is an apocalyptic number.

It is an amenable number.

23220209 is a deficient number, since it is larger than the sum of its proper divisors (1260559).

23220209 is a wasteful number, since it uses less digits than its factorization.

23220209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16015.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 23220209 is about 4818.7352075000. The cubic root of 23220209 is about 285.2914183428.

The spelling of 23220209 in words is "twenty-three million, two hundred twenty thousand, two hundred nine".