231017855 has 8 divisors (see below), whose sum is σ = 277849872. Its totient is φ = 184395328.

The previous prime is 231017851. The next prime is 231017867. The reversal of 231017855 is 558710132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231017855 - 2² = 231017851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231017851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49934 + ... + 54363.

It is an arithmetic number, because the mean of its divisors is an integer number (34731234).

Almost surely, 2^231017855 is an apocalyptic number.

231017855 is a deficient number, since it is larger than the sum of its proper divisors (46832017).

231017855 is a wasteful number, since it uses less digits than its factorization.

231017855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104745.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 231017855 is about 15199.2715285964. The cubic root of 231017855 is about 613.5950522997.

Adding to 231017855 its reverse (558710132), we get a palindrome (789727987).

The spelling of 231017855 in words is "two hundred thirty-one million, seventeen thousand, eight hundred fifty-five".