231231133 has 8 divisors (see below), whose sum is σ = 264642560. Its totient is φ = 197914320.

The previous prime is 231231131. The next prime is 231231151. The reversal of 231231133 is 331132132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231231133 - 2¹ = 231231131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231231133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231231131) 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, 18333 + ... + 28258.

It is an arithmetic number, because the mean of its divisors is an integer number (33080320).

Almost surely, 2^231231133 is an apocalyptic number.

It is an amenable number.

231231133 is a deficient number, since it is larger than the sum of its proper divisors (33411427).

231231133 is an equidigital number, since it uses as much as digits as its factorization.

231231133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47307.

The product of its digits is 324, while the sum is 19.

The square root of 231231133 is about 15206.2859699533. The cubic root of 231231133 is about 613.7838199224.

Adding to 231231133 its reverse (331132132), we get a palindrome (562363265).

Subtracting 231231133 from its reverse (331132132), we obtain a palindrome (99900999).

The spelling of 231231133 in words is "two hundred thirty-one million, two hundred thirty-one thousand, one hundred thirty-three".