231113233 has 8 divisors (see below), whose sum is σ = 249820200. Its totient is φ = 212539008.

The previous prime is 231113219. The next prime is 231113237. The reversal of 231113233 is 332311132.

It can be written as a sum of positive squares in 4 ways, for example, as 10679824 + 220433409 = 3268^2 + 14847^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231113233 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 231113233.

It is not an unprimeable number, because it can be changed into a prime (231113237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29548 + ... + 36541.

It is an arithmetic number, because the mean of its divisors is an integer number (31227525).

Almost surely, 2^231113233 is an apocalyptic number.

It is an amenable number.

231113233 is a deficient number, since it is larger than the sum of its proper divisors (18706967).

231113233 is a wasteful number, since it uses less digits than its factorization.

231113233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66371.

The product of its digits is 324, while the sum is 19.

The square root of 231113233 is about 15202.4087893991. The cubic root of 231113233 is about 613.6794836045.

Adding to 231113233 its reverse (332311132), we get a palindrome (563424365).

The spelling of 231113233 in words is "two hundred thirty-one million, one hundred thirteen thousand, two hundred thirty-three".