231130636 has 24 divisors (see below), whose sum is σ = 444628800. Its totient is φ = 104254800.

The previous prime is 231130619. The next prime is 231130639. The reversal of 231130636 is 636031132.

It is a self number, because there is not a number n which added to its sum of digits gives 231130636.

It is not an unprimeable number, because it can be changed into a prime (231130639) 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, 14286 + ... + 25813.

It is an arithmetic number, because the mean of its divisors is an integer number (18526200).

Almost surely, 2^231130636 is an apocalyptic number.

It is an amenable number.

231130636 is a deficient number, since it is larger than the sum of its proper divisors (213498164).

231130636 is a wasteful number, since it uses less digits than its factorization.

231130636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40245 (or 40243 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 231130636 is about 15202.9811550235. The cubic root of 231130636 is about 613.6948867265.

Adding to 231130636 its reverse (636031132), we get a palindrome (867161768).

The spelling of 231130636 in words is "two hundred thirty-one million, one hundred thirty thousand, six hundred thirty-six".