11185213 has 8 divisors (see below), whose sum is σ = 12461400. Its totient is φ = 9968448.

The previous prime is 11185183. The next prime is 11185231. The reversal of 11185213 is 31258111.

It can be written as a sum of positive squares in 4 ways, for example, as 142884 + 11042329 = 378^2 + 3323^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11185213 - 2¹³ = 11177021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11186213) 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 7 ways as a sum of consecutive naturals, for example, 14458 + ... + 15211.

It is an arithmetic number, because the mean of its divisors is an integer number (1557675).

Almost surely, 2^11185213 is an apocalyptic number.

11185213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11185213 is a deficient number, since it is larger than the sum of its proper divisors (1276187).

11185213 is a wasteful number, since it uses less digits than its factorization.

11185213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29711.

The product of its digits is 240, while the sum is 22.

The square root of 11185213 is about 3344.4301457797. The cubic root of 11185213 is about 223.6392804478.

The spelling of 11185213 in words is "eleven million, one hundred eighty-five thousand, two hundred thirteen".