11230209 has 6 divisors (see below), whose sum is σ = 16221426. Its totient is φ = 7486800.

The previous prime is 11230201. The next prime is 11230213. The reversal of 11230209 is 90203211.

It is a happy number.

11230209 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10870209 + 360000 = 3297^2 + 600^2 .

It is not a de Polignac number, because 11230209 - 2³ = 11230201 is a prime.

It is a super-2 number, since 2×11230209² = 252235188367362, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11230191 and 11230200.

It is not an unprimeable number, because it can be changed into a prime (11230201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 623892 + ... + 623909.

It is an arithmetic number, because the mean of its divisors is an integer number (2703571).

Almost surely, 2^11230209 is an apocalyptic number.

It is an amenable number.

11230209 is a deficient number, since it is larger than the sum of its proper divisors (4991217).

11230209 is a wasteful number, since it uses less digits than its factorization.

11230209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247807 (or 1247804 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 11230209 is about 3351.1503994897. The cubic root of 11230209 is about 223.9387654154.

The spelling of 11230209 in words is "eleven million, two hundred thirty thousand, two hundred nine".