231231233 has 4 divisors (see below), whose sum is σ = 231275520. Its totient is φ = 231186948.

The previous prime is 231231199. The next prime is 231231251. The reversal of 231231233 is 332132132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231231233 - 2¹⁴ = 231214849 is a prime.

It is a super-3 number, since 3×231231233³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231231293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13073 + ... + 25166.

It is an arithmetic number, because the mean of its divisors is an integer number (57818880).

Almost surely, 2^231231233 is an apocalyptic number.

It is an amenable number.

231231233 is a deficient number, since it is larger than the sum of its proper divisors (44287).

231231233 is an equidigital number, since it uses as much as digits as its factorization.

231231233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44286.

The product of its digits is 648, while the sum is 20.

The square root of 231231233 is about 15206.2892580669. The cubic root of 231231233 is about 613.7839084029.

Adding to 231231233 its reverse (332132132), we get a palindrome (563363365).

The spelling of 231231233 in words is "two hundred thirty-one million, two hundred thirty-one thousand, two hundred thirty-three".