231203313 has 24 divisors (see below), whose sum is σ = 365678976. Its totient is φ = 139600800.

The previous prime is 231203299. The next prime is 231203327. The reversal of 231203313 is 313302132.

It is an interprime number because it is at equal distance from previous prime (231203299) and next prime (231203327).

It is not a de Polignac number, because 231203313 - 2⁶ = 231203249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231203333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23208 + ... + 31638.

It is an arithmetic number, because the mean of its divisors is an integer number (15236624).

Almost surely, 2^231203313 is an apocalyptic number.

It is an amenable number.

231203313 is a deficient number, since it is larger than the sum of its proper divisors (134475663).

231203313 is a wasteful number, since it uses less digits than its factorization.

231203313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8725 (or 8722 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 231203313 is about 15205.3711891555. The cubic root of 231203313 is about 613.7592036427.

Adding to 231203313 its reverse (313302132), we get a palindrome (544505445).

The spelling of 231203313 in words is "two hundred thirty-one million, two hundred three thousand, three hundred thirteen".