11221509 has 8 divisors (see below), whose sum is σ = 16112992. Its totient is φ = 6905520.

The previous prime is 11221501. The next prime is 11221523. The reversal of 11221509 is 90512211.

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

It is not a de Polignac number, because 11221509 - 2³ = 11221501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143827 + ... + 143904.

It is an arithmetic number, because the mean of its divisors is an integer number (2014124).

Almost surely, 2^11221509 is an apocalyptic number.

It is an amenable number.

11221509 is a deficient number, since it is larger than the sum of its proper divisors (4891483).

11221509 is a wasteful number, since it uses less digits than its factorization.

11221509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287747.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 11221509 is about 3349.8520862868. The cubic root of 11221509 is about 223.8809223073.

The spelling of 11221509 in words is "eleven million, two hundred twenty-one thousand, five hundred nine".