231042133 has 4 divisors (see below), whose sum is σ = 264048160. Its totient is φ = 198036108.

The previous prime is 231042127. The next prime is 231042157. The reversal of 231042133 is 331240132.

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 231042133 - 2⁹ = 231041621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231042133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231042103) 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, 16503003 + ... + 16503016.

It is an arithmetic number, because the mean of its divisors is an integer number (66012040).

Almost surely, 2^231042133 is an apocalyptic number.

It is an amenable number.

231042133 is a deficient number, since it is larger than the sum of its proper divisors (33006027).

231042133 is an equidigital number, since it uses as much as digits as its factorization.

231042133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33006026.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 231042133 is about 15200.0701643117. The cubic root of 231042133 is about 613.6165460769.

Adding to 231042133 its reverse (331240132), we get a palindrome (562282265).

The spelling of 231042133 in words is "two hundred thirty-one million, forty-two thousand, one hundred thirty-three".