9831213 has 30 divisors (see below), whose sum is σ = 17090766. Its totient is φ = 5615568.

The previous prime is 9831193. The next prime is 9831223. The reversal of 9831213 is 3121389.

It can be written as a sum of positive squares in only one way, i.e., 8398404 + 1432809 = 2898^2 + 1197^2 .

It is not a de Polignac number, because 9831213 - 2⁵ = 9831181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9831223) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2731 + ... + 5207.

Almost surely, 2^9831213 is an apocalyptic number.

It is an amenable number.

9831213 is a deficient number, since it is larger than the sum of its proper divisors (7259553).

9831213 is a wasteful number, since it uses less digits than its factorization.

9831213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503 (or 2487 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 9831213 is about 3135.4765188086. The cubic root of 9831213 is about 214.2244493430.

The spelling of 9831213 in words is "nine million, eight hundred thirty-one thousand, two hundred thirteen".