11517213 has 16 divisors (see below), whose sum is σ = 16128000. Its totient is φ = 7301040.

The previous prime is 11517203. The next prime is 11517221. The reversal of 11517213 is 31271511.

It is a happy number.

It is not a de Polignac number, because 11517213 - 2⁴ = 11517197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11517213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11517203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4438 + ... + 6536.

It is an arithmetic number, because the mean of its divisors is an integer number (1008000).

Almost surely, 2^11517213 is an apocalyptic number.

It is an amenable number.

11517213 is a deficient number, since it is larger than the sum of its proper divisors (4610787).

11517213 is a wasteful number, since it uses less digits than its factorization.

11517213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192.

The product of its digits is 210, while the sum is 21.

The square root of 11517213 is about 3393.7019609860. The cubic root of 11517213 is about 225.8304324944.

Adding to 11517213 its reverse (31271511), we get a palindrome (42788724).

The spelling of 11517213 in words is "eleven million, five hundred seventeen thousand, two hundred thirteen".