9213220 has 24 divisors (see below), whose sum is σ = 19543608. Its totient is φ = 3648000.

The previous prime is 9213209. The next prime is 9213221. The reversal of 9213220 is 223129.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2359296 + 6853924 = 1536^2 + 2618^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9213221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261 + ... + 4300.

It is an arithmetic number, because the mean of its divisors is an integer number (814317).

Almost surely, 2^9213220 is an apocalyptic number.

It is an amenable number.

9213220 is an abundant number, since it is smaller than the sum of its proper divisors (10330388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9213220 is a wasteful number, since it uses less digits than its factorization.

9213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671 (or 4669 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 9213220 is about 3035.3286477744. The cubic root of 9213220 is about 209.6382282214.

Adding to 9213220 its reverse (223129), we get a palindrome (9436349).

The spelling of 9213220 in words is "nine million, two hundred thirteen thousand, two hundred twenty".