9213231 has 16 divisors (see below), whose sum is σ = 12781568. Its totient is φ = 5896800.

The previous prime is 9213227. The next prime is 9213283. The reversal of 9213231 is 1323129.

It is a happy number.

9213231 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9213231 - 2² = 9213227 is a prime.

It is a super-2 number, since 2×9213231² = 169767250918722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9213198 and 9213207.

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 15 ways as a sum of consecutive naturals, for example, 14286 + ... + 14916.

It is an arithmetic number, because the mean of its divisors is an integer number (798848).

Almost surely, 2^9213231 is an apocalyptic number.

9213231 is a deficient number, since it is larger than the sum of its proper divisors (3568337).

9213231 is a wasteful number, since it uses less digits than its factorization.

9213231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822.

The product of its digits is 324, while the sum is 21.

The square root of 9213231 is about 3035.3304597688. The cubic root of 9213231 is about 209.6383116530.

The spelling of 9213231 in words is "nine million, two hundred thirteen thousand, two hundred thirty-one".