231323133 has 8 divisors (see below), whose sum is σ = 309316000. Its totient is φ = 153772848.

The previous prime is 231323123. The next prime is 231323137. The reversal of 231323133 is 331323132.

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

It is not a de Polignac number, because 231323133 - 2⁶ = 231323069 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 (231323137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109423 + ... + 111516.

It is an arithmetic number, because the mean of its divisors is an integer number (38664500).

Almost surely, 2^231323133 is an apocalyptic number.

It is an amenable number.

231323133 is a deficient number, since it is larger than the sum of its proper divisors (77992867).

231323133 is a wasteful number, since it uses less digits than its factorization.

231323133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221291.

The product of its digits is 972, while the sum is 21.

The square root of 231323133 is about 15209.3107338893. The cubic root of 231323133 is about 613.8652112463.

Adding to 231323133 its reverse (331323132), we get a palindrome (562646265).

Subtracting 231323133 from its reverse (331323132), we obtain a palindrome (99999999).

The spelling of 231323133 in words is "two hundred thirty-one million, three hundred twenty-three thousand, one hundred thirty-three".