11215215 has 48 divisors (see below), whose sum is σ = 21490560. Its totient is φ = 5365440.

The previous prime is 11215213. The next prime is 11215229. The reversal of 11215215 is 51251211.

It is not a de Polignac number, because 11215215 - 2¹ = 11215213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11215213) 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 47 ways as a sum of consecutive naturals, for example, 68724 + ... + 68886.

It is an arithmetic number, because the mean of its divisors is an integer number (447720).

Almost surely, 2^11215215 is an apocalyptic number.

11215215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11215215 is a deficient number, since it is larger than the sum of its proper divisors (10275345).

11215215 is a wasteful number, since it uses less digits than its factorization.

11215215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 321 counting only the distinct ones).

The product of its digits is 100, while the sum is 18.

The square root of 11215215 is about 3348.9125100546. The cubic root of 11215215 is about 223.8390571696.

Adding to 11215215 its reverse (51251211), we get a palindrome (62466426).

It can be divided in two parts, 1121 and 5215, that added together give a palindrome (6336).

The spelling of 11215215 in words is "eleven million, two hundred fifteen thousand, two hundred fifteen".