231018118112815 has 16 divisors (see below), whose sum is σ = 315572575574016. Its totient is φ = 160708256077600.

The previous prime is 231018118112783. The next prime is 231018118112833. The reversal of 231018118112815 is 518211811810132.

It is not a de Polignac number, because 231018118112815 - 2⁵ = 231018118112783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91311507871 + ... + 91311510400.

It is an arithmetic number, because the mean of its divisors is an integer number (19723285973376).

Almost surely, 2^{231018118112815} is an apocalyptic number.

231018118112815 is a deficient number, since it is larger than the sum of its proper divisors (84554457461201).

231018118112815 is a wasteful number, since it uses less digits than its factorization.

231018118112815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182623018310.

The product of its (nonzero) digits is 30720, while the sum is 43.

Adding to 231018118112815 its reverse (518211811810132), we get a palindrome (749229929922947).

The spelling of 231018118112815 in words is "two hundred thirty-one trillion, eighteen billion, one hundred eighteen million, one hundred twelve thousand, eight hundred fifteen".