231045113 has 16 divisors (see below), whose sum is σ = 264022416. Its totient is φ = 200294400.

The previous prime is 231045109. The next prime is 231045119. The reversal of 231045113 is 311540132.

It can be written as a sum of positive squares in 8 ways, for example, as 7333264 + 223711849 = 2708^2 + 14957^2 .

It is a cyclic number.

It is not a de Polignac number, because 231045113 - 2² = 231045109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231045119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143513 + ... + 145113.

It is an arithmetic number, because the mean of its divisors is an integer number (16501401).

Almost surely, 2^231045113 is an apocalyptic number.

It is an amenable number.

231045113 is a deficient number, since it is larger than the sum of its proper divisors (32977303).

231045113 is a wasteful number, since it uses less digits than its factorization.

231045113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 231045113 is about 15200.1681898590. The cubic root of 231045113 is about 613.6191842240.

Adding to 231045113 its reverse (311540132), we get a palindrome (542585245).

The spelling of 231045113 in words is "two hundred thirty-one million, forty-five thousand, one hundred thirteen".