11513211 has 4 divisors (see below), whose sum is σ = 15350952. Its totient is φ = 7675472.

The previous prime is 11513209. The next prime is 11513219. The reversal of 11513211 is 11231511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11231511 = 3 ⋅3743837.

It is a cyclic number.

It is not a de Polignac number, because 11513211 - 2¹ = 11513209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11513219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1918866 + ... + 1918871.

It is an arithmetic number, because the mean of its divisors is an integer number (3837738).

Almost surely, 2^11513211 is an apocalyptic number.

11513211 is a deficient number, since it is larger than the sum of its proper divisors (3837741).

11513211 is an equidigital number, since it uses as much as digits as its factorization.

11513211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3837740.

The product of its digits is 30, while the sum is 15.

The square root of 11513211 is about 3393.1122881508. The cubic root of 11513211 is about 225.8042722855.

Adding to 11513211 its reverse (11231511), we get a palindrome (22744722).

The spelling of 11513211 in words is "eleven million, five hundred thirteen thousand, two hundred eleven".