231023565 has 48 divisors (see below), whose sum is σ = 430560000. Its totient is φ = 114224256.

The previous prime is 231023549. The next prime is 231023579. The reversal of 231023565 is 565320132.

It is not a de Polignac number, because 231023565 - 2⁴ = 231023549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37311 + ... + 43059.

It is an arithmetic number, because the mean of its divisors is an integer number (8970000).

Almost surely, 2^231023565 is an apocalyptic number.

It is an amenable number.

231023565 is a deficient number, since it is larger than the sum of its proper divisors (199536435).

231023565 is a wasteful number, since it uses less digits than its factorization.

231023565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5826 (or 5823 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 231023565 is about 15199.4593653853. The cubic root of 231023565 is about 613.6001076072.

Adding to 231023565 its reverse (565320132), we get a palindrome (796343697).

The spelling of 231023565 in words is "two hundred thirty-one million, twenty-three thousand, five hundred sixty-five".