231135530 has 16 divisors (see below), whose sum is σ = 421905024. Its totient is φ = 91151760.

The previous prime is 231135523. The next prime is 231135547. The reversal of 231135530 is 35531132.

It is a junction number, because it is equal to n+sod(n) for n = 231135496 and 231135505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162062 + ... + 163481.

It is an arithmetic number, because the mean of its divisors is an integer number (26369064).

Almost surely, 2^231135530 is an apocalyptic number.

231135530 is a deficient number, since it is larger than the sum of its proper divisors (190769494).

231135530 is a wasteful number, since it uses less digits than its factorization.

231135530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325621.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 231135530 is about 15203.1421094457. The cubic root of 231135530 is about 613.6992181898.

Adding to 231135530 its reverse (35531132), we get a palindrome (266666662).

The spelling of 231135530 in words is "two hundred thirty-one million, one hundred thirty-five thousand, five hundred thirty".