231344133 has 16 divisors (see below), whose sum is σ = 330201600. Its totient is φ = 143633520.

The previous prime is 231344129. The next prime is 231344137. The reversal of 231344133 is 331443132.

It is an interprime number because it is at equal distance from previous prime (231344129) and next prime (231344137).

It is not a de Polignac number, because 231344133 - 2² = 231344129 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231344137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31033 + ... + 37758.

It is an arithmetic number, because the mean of its divisors is an integer number (20637600).

Almost surely, 2^231344133 is an apocalyptic number.

It is an amenable number.

231344133 is a deficient number, since it is larger than the sum of its proper divisors (98857467).

231344133 is a wasteful number, since it uses less digits than its factorization.

231344133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68872.

The product of its digits is 2592, while the sum is 24.

The square root of 231344133 is about 15210.0010848126. The cubic root of 231344133 is about 613.8837866753.

Adding to 231344133 its reverse (331443132), we get a palindrome (562787265).

The spelling of 231344133 in words is "two hundred thirty-one million, three hundred forty-four thousand, one hundred thirty-three".