201230209 has 2 divisors, whose sum is σ = 201230210. Its totient is φ = 201230208.

The previous prime is 201230203. The next prime is 201230219. The reversal of 201230209 is 902032102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200081025 + 1149184 = 14145^2 + 1072^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201230209 is a prime.

It is not a weakly prime, because it can be changed into another prime (201230203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100615104 + 100615105.

It is an arithmetic number, because the mean of its divisors is an integer number (100615105).

Almost surely, 2^201230209 is an apocalyptic number.

It is an amenable number.

201230209 is a deficient number, since it is larger than the sum of its proper divisors (1).

201230209 is an equidigital number, since it uses as much as digits as its factorization.

201230209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 201230209 is about 14185.5634008664. The cubic root of 201230209 is about 586.0001485165. Note that the first 3 decimals are identical.

The spelling of 201230209 in words is "two hundred one million, two hundred thirty thousand, two hundred nine".