231113863 has 4 divisors (see below), whose sum is σ = 236488648. Its totient is φ = 225739080.

The previous prime is 231113851. The next prime is 231113893. The reversal of 231113863 is 368311132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231113863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231113893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2687328 + ... + 2687413.

It is an arithmetic number, because the mean of its divisors is an integer number (59122162).

Almost surely, 2^231113863 is an apocalyptic number.

231113863 is a deficient number, since it is larger than the sum of its proper divisors (5374785).

231113863 is an equidigital number, since it uses as much as digits as its factorization.

231113863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5374784.

The product of its digits is 2592, while the sum is 28.

The square root of 231113863 is about 15202.4295097856. The cubic root of 231113863 is about 613.6800412211.

Adding to 231113863 its reverse (368311132), we get a palindrome (599424995).

The spelling of 231113863 in words is "two hundred thirty-one million, one hundred thirteen thousand, eight hundred sixty-three".