11185513 has 4 divisors (see below), whose sum is σ = 11546368. Its totient is φ = 10824660.

The previous prime is 11185501. The next prime is 11185519. The reversal of 11185513 is 31558111.

11185513 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31558111 = 13 ⋅2427547.

It is a cyclic number.

It is not a de Polignac number, because 11185513 - 2⁹ = 11185001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11185519) 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 3 ways as a sum of consecutive naturals, for example, 180381 + ... + 180442.

It is an arithmetic number, because the mean of its divisors is an integer number (2886592).

Almost surely, 2^11185513 is an apocalyptic number.

It is an amenable number.

11185513 is a deficient number, since it is larger than the sum of its proper divisors (360855).

11185513 is an equidigital number, since it uses as much as digits as its factorization.

11185513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360854.

The product of its digits is 600, while the sum is 25.

The square root of 11185513 is about 3344.4749961691. The cubic root of 11185513 is about 223.6412798489.

The spelling of 11185513 in words is "eleven million, one hundred eighty-five thousand, five hundred thirteen".