11155215 has 16 divisors (see below), whose sum is σ = 18229248. Its totient is φ = 5822496.

The previous prime is 11155201. The next prime is 11155219. The reversal of 11155215 is 51255111.

It is not a de Polignac number, because 11155215 - 2⁸ = 11154959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11155191 and 11155200.

It is a congruent number.

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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7207 + ... + 8616.

It is an arithmetic number, because the mean of its divisors is an integer number (1139328).

Almost surely, 2^11155215 is an apocalyptic number.

11155215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11155215 is a deficient number, since it is larger than the sum of its proper divisors (7074033).

11155215 is a wasteful number, since it uses less digits than its factorization.

11155215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15878.

The product of its digits is 250, while the sum is 21.

The square root of 11155215 is about 3339.9423647722. The cubic root of 11155215 is about 223.4391728729.

The spelling of 11155215 in words is "eleven million, one hundred fifty-five thousand, two hundred fifteen".