11229509 has 2 divisors, whose sum is σ = 11229510. Its totient is φ = 11229508.

The previous prime is 11229461. The next prime is 11229511. The reversal of 11229509 is 90592211.

11229509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7317025 + 3912484 = 2705^2 + 1978^2 .

It is a cyclic number.

It is not a de Polignac number, because 11229509 - 2¹² = 11225413 is a prime.

It is a super-2 number, since 2×11229509² = 252203744762162, which contains 22 as substring.

Together with 11229511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11229599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5614754 + 5614755.

It is an arithmetic number, because the mean of its divisors is an integer number (5614755).

Almost surely, 2^11229509 is an apocalyptic number.

It is an amenable number.

11229509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11229509 is an equidigital number, since it uses as much as digits as its factorization.

11229509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 11229509 is about 3351.0459561158. The cubic root of 11229509 is about 223.9341124776.

The spelling of 11229509 in words is "eleven million, two hundred twenty-nine thousand, five hundred nine".