11145215 has 4 divisors (see below), whose sum is σ = 13374264. Its totient is φ = 8916168.

The previous prime is 11145187. The next prime is 11145221. The reversal of 11145215 is 51254111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11145215 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1114517 + ... + 1114526.

It is an arithmetic number, because the mean of its divisors is an integer number (3343566).

Almost surely, 2^11145215 is an apocalyptic number.

11145215 is a deficient number, since it is larger than the sum of its proper divisors (2229049).

11145215 is an equidigital number, since it uses as much as digits as its factorization.

11145215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2229048.

The product of its digits is 200, while the sum is 20.

The square root of 11145215 is about 3338.4449973004. Note that the first 3 decimals coincide. The cubic root of 11145215 is about 223.3723861808.

Adding to 11145215 its reverse (51254111), we get a palindrome (62399326).

The spelling of 11145215 in words is "eleven million, one hundred forty-five thousand, two hundred fifteen".