11813211 has 6 divisors (see below), whose sum is σ = 17063540. Its totient is φ = 7875468.

The previous prime is 11813209. The next prime is 11813213. The reversal of 11813211 is 11231811.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11813209) and next prime (11813213).

It is not a de Polignac number, because 11813211 - 2¹ = 11813209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11813213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 656281 + ... + 656298.

Almost surely, 2^11813211 is an apocalyptic number.

11813211 is a deficient number, since it is larger than the sum of its proper divisors (5250329).

11813211 is a wasteful number, since it uses less digits than its factorization.

11813211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312585 (or 1312582 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

The square root of 11813211 is about 3437.0352049404. The cubic root of 11813211 is about 227.7487421424.

The spelling of 11813211 in words is "eleven million, eight hundred thirteen thousand, two hundred eleven".