11155217 has 4 divisors (see below), whose sum is σ = 11161920. Its totient is φ = 11148516.

The previous prime is 11155201. The next prime is 11155219. The reversal of 11155217 is 71255111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 71255111 = 19 ⋅3750269.

It is a cyclic number.

It is not a de Polignac number, because 11155217 - 2⁴ = 11155201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11155192 and 11155201.

It is not an unprimeable number, because it can be changed into a prime (11155219) 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 3 ways as a sum of consecutive naturals, for example, 1268 + ... + 4890.

It is an arithmetic number, because the mean of its divisors is an integer number (2790480).

Almost surely, 2^11155217 is an apocalyptic number.

It is an amenable number.

11155217 is a deficient number, since it is larger than the sum of its proper divisors (6703).

11155217 is an equidigital number, since it uses as much as digits as its factorization.

11155217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6702.

The product of its digits is 350, while the sum is 23.

The square root of 11155217 is about 3339.9426641785. The cubic root of 11155217 is about 223.4391862262.

The spelling of 11155217 in words is "eleven million, one hundred fifty-five thousand, two hundred seventeen".