11215305 has 12 divisors (see below), whose sum is σ = 19439940. Its totient is φ = 5981472.

The previous prime is 11215297. The next prime is 11215307. The reversal of 11215305 is 50351211.

It can be written as a sum of positive squares in 2 ways, for example, as 8311689 + 2903616 = 2883^2 + 1704^2 .

It is not a de Polignac number, because 11215305 - 2³ = 11215297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11215307) 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 11 ways as a sum of consecutive naturals, for example, 124570 + ... + 124659.

It is an arithmetic number, because the mean of its divisors is an integer number (1619995).

Almost surely, 2^11215305 is an apocalyptic number.

11215305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11215305 is a deficient number, since it is larger than the sum of its proper divisors (8224635).

11215305 is a wasteful number, since it uses less digits than its factorization.

11215305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249240 (or 249237 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 11215305 is about 3348.9259472255. The cubic root of 11215305 is about 223.8396559235.

Adding to 11215305 its reverse (50351211), we get a palindrome (61566516).

The spelling of 11215305 in words is "eleven million, two hundred fifteen thousand, three hundred five".