230331133 has 4 divisors (see below), whose sum is σ = 233486428. Its totient is φ = 227175840.

The previous prime is 230331121. The next prime is 230331139. The reversal of 230331133 is 331133032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 140707044 + 89624089 = 11862^2 + 9467^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230331133 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 230331133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230331139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1577538 + ... + 1577683.

It is an arithmetic number, because the mean of its divisors is an integer number (58371607).

Almost surely, 2^230331133 is an apocalyptic number.

It is an amenable number.

230331133 is a deficient number, since it is larger than the sum of its proper divisors (3155295).

230331133 is an equidigital number, since it uses as much as digits as its factorization.

230331133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155294.

The product of its (nonzero) digits is 486, while the sum is 19.

The square root of 230331133 is about 15176.6640932716. The cubic root of 230331133 is about 612.9864594674.

Adding to 230331133 its reverse (331133032), we get a palindrome (561464165).

The spelling of 230331133 in words is "two hundred thirty million, three hundred thirty-one thousand, one hundred thirty-three".