231113645 has 12 divisors (see below), whose sum is σ = 322616124. Its totient is φ = 158477760.

The previous prime is 231113639. The next prime is 231113647. The reversal of 231113645 is 546311132.

It can be written as a sum of positive squares in 2 ways, for example, as 89170249 + 141943396 = 9443^2 + 11914^2 .

It is not a de Polignac number, because 231113645 - 2²⁴ = 214336429 is a prime.

It is a super-3 number, since 3×231113645³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231113647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 471416 + ... + 471905.

It is an arithmetic number, because the mean of its divisors is an integer number (26884677).

Almost surely, 2^231113645 is an apocalyptic number.

It is an amenable number.

231113645 is a deficient number, since it is larger than the sum of its proper divisors (91502479).

231113645 is an equidigital number, since it uses as much as digits as its factorization.

231113645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943340 (or 943333 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 231113645 is about 15202.4223398773. The cubic root of 231113645 is about 613.6798482682.

Adding to 231113645 its reverse (546311132), we get a palindrome (777424777).

The spelling of 231113645 in words is "two hundred thirty-one million, one hundred thirteen thousand, six hundred forty-five".