231040133 has 8 divisors (see below), whose sum is σ = 244562400. Its totient is φ = 217654128.

The previous prime is 231040097. The next prime is 231040151. The reversal of 231040133 is 331040132.

It is a happy number.

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 231040133 - 2²⁰ = 229991557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231040153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30566 + ... + 37367.

It is an arithmetic number, because the mean of its divisors is an integer number (30570300).

Almost surely, 2^231040133 is an apocalyptic number.

It is an amenable number.

231040133 is a deficient number, since it is larger than the sum of its proper divisors (13522267).

231040133 is a wasteful number, since it uses less digits than its factorization.

231040133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68131.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 231040133 is about 15200.0043749994. The cubic root of 231040133 is about 613.6147754956.

Adding to 231040133 its reverse (331040132), we get a palindrome (562080265).

Subtracting 231040133 from its reverse (331040132), we obtain a palindrome (99999999).

The spelling of 231040133 in words is "two hundred thirty-one million, forty thousand, one hundred thirty-three".