11816213 has 2 divisors, whose sum is σ = 11816214. Its totient is φ = 11816212.

The previous prime is 11816201. The next prime is 11816221. The reversal of 11816213 is 31261811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8514724 + 3301489 = 2918^2 + 1817^2 .

It is a cyclic number.

It is not a de Polignac number, because 11816213 - 2⁴ = 11816197 is a prime.

It is a super-2 number, since 2×11816213² = 279245779322738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11810213) 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 as a sum of consecutive naturals, namely, 5908106 + 5908107.

It is an arithmetic number, because the mean of its divisors is an integer number (5908107).

Almost surely, 2^11816213 is an apocalyptic number.

It is an amenable number.

11816213 is a deficient number, since it is larger than the sum of its proper divisors (1).

11816213 is an equidigital number, since it uses as much as digits as its factorization.

11816213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 23.

The square root of 11816213 is about 3437.4718907942. The cubic root of 11816213 is about 227.7680325176.

The spelling of 11816213 in words is "eleven million, eight hundred sixteen thousand, two hundred thirteen".