9815223 has 16 divisors (see below), whose sum is σ = 14610816. Its totient is φ = 5809440.

The previous prime is 9815219. The next prime is 9815231. The reversal of 9815223 is 3225189.

It is a happy number.

It is not a de Polignac number, because 9815223 - 2² = 9815219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9815203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2040 + ... + 4877.

It is an arithmetic number, because the mean of its divisors is an integer number (913176).

Almost surely, 2^9815223 is an apocalyptic number.

9815223 is a deficient number, since it is larger than the sum of its proper divisors (4795593).

9815223 is a wasteful number, since it uses less digits than its factorization.

9815223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6974.

The product of its digits is 4320, while the sum is 30.

The square root of 9815223 is about 3132.9256295035. The cubic root of 9815223 is about 214.1082443628.

The spelling of 9815223 in words is "nine million, eight hundred fifteen thousand, two hundred twenty-three".