11219209 has 2 divisors, whose sum is σ = 11219210. Its totient is φ = 11219208.

The previous prime is 11219203. The next prime is 11219231. The reversal of 11219209 is 90291211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9455625 + 1763584 = 3075^2 + 1328^2 .

It is a cyclic number.

It is not a de Polignac number, because 11219209 - 2¹⁷ = 11088137 is a prime.

It is not a weakly prime, because it can be changed into another prime (11219203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5609604 + 5609605.

It is an arithmetic number, because the mean of its divisors is an integer number (5609605).

Almost surely, 2^11219209 is an apocalyptic number.

It is an amenable number.

11219209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11219209 is an equidigital number, since it uses as much as digits as its factorization.

11219209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 11219209 is about 3349.5087699542. The cubic root of 11219209 is about 223.8656254547.

It can be divided in two parts, 112 and 19209, that added together give a square (19321 = 139²).

The spelling of 11219209 in words is "eleven million, two hundred nineteen thousand, two hundred nine".