11217955 has 8 divisors (see below), whose sum is σ = 15384672. Its totient is φ = 7692288.

The previous prime is 11217949. The next prime is 11217959. The reversal of 11217955 is 55971211.

11217955 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 11217955 - 2¹¹ = 11215907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11217959) 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, 160222 + ... + 160291.

It is an arithmetic number, because the mean of its divisors is an integer number (1923084).

Almost surely, 2^11217955 is an apocalyptic number.

11217955 is a deficient number, since it is larger than the sum of its proper divisors (4166717).

11217955 is an equidigital number, since it uses as much as digits as its factorization.

11217955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320525.

The product of its digits is 3150, while the sum is 31.

The square root of 11217955 is about 3349.3215730951. The cubic root of 11217955 is about 223.8572844640.

The spelling of 11217955 in words is "eleven million, two hundred seventeen thousand, nine hundred fifty-five".