231233133 has 16 divisors (see below), whose sum is σ = 326790720. Its totient is φ = 144934656.

The previous prime is 231233129. The next prime is 231233141. The reversal of 231233133 is 331332132.

It is not a de Polignac number, because 231233133 - 2² = 231233129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231233183) 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, 64923 + ... + 68391.

It is an arithmetic number, because the mean of its divisors is an integer number (20424420).

Almost surely, 2^231233133 is an apocalyptic number.

It is an amenable number.

231233133 is a deficient number, since it is larger than the sum of its proper divisors (95557587).

231233133 is a wasteful number, since it uses less digits than its factorization.

231233133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4796.

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

The square root of 231233133 is about 15206.3517320888. The cubic root of 231233133 is about 613.7855895285.

Adding to 231233133 its reverse (331332132), we get a palindrome (562565265).

The spelling of 231233133 in words is "two hundred thirty-one million, two hundred thirty-three thousand, one hundred thirty-three".