9816213 has 16 divisors (see below), whose sum is σ = 14414400. Its totient is φ = 5892480.

The previous prime is 9816203. The next prime is 9816221. The reversal of 9816213 is 3126189.

It is not a de Polignac number, because 9816213 - 2¹⁷ = 9685141 is a prime.

It is a super-2 number, since 2×9816213² = 192716075322738, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9816203) 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 15 ways as a sum of consecutive naturals, for example, 2233 + ... + 4961.

It is an arithmetic number, because the mean of its divisors is an integer number (900900).

Almost surely, 2^9816213 is an apocalyptic number.

It is an amenable number.

9816213 is a deficient number, since it is larger than the sum of its proper divisors (4598187).

9816213 is a wasteful number, since it uses less digits than its factorization.

9816213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2852.

The product of its digits is 2592, while the sum is 30.

The square root of 9816213 is about 3133.0836248016. The cubic root of 9816213 is about 214.1154427062.

The spelling of 9816213 in words is "nine million, eight hundred sixteen thousand, two hundred thirteen".