11166215 has 4 divisors (see below), whose sum is σ = 13399464. Its totient is φ = 8932968.

The previous prime is 11166203. The next prime is 11166217. The reversal of 11166215 is 51266111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51266111 = 13 ⋅3943547.

It is a cyclic number.

It is not a de Polignac number, because 11166215 - 2⁶ = 11166151 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 (11166217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1116617 + ... + 1116626.

It is an arithmetic number, because the mean of its divisors is an integer number (3349866).

Almost surely, 2^11166215 is an apocalyptic number.

11166215 is a deficient number, since it is larger than the sum of its proper divisors (2233249).

11166215 is an equidigital number, since it uses as much as digits as its factorization.

11166215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233248.

The product of its digits is 360, while the sum is 23.

The square root of 11166215 is about 3341.5886940197. The cubic root of 11166215 is about 223.5125921501.

The spelling of 11166215 in words is "eleven million, one hundred sixty-six thousand, two hundred fifteen".