231115332505 has 8 divisors (see below), whose sum is σ = 277524167112. Its totient is φ = 184768420608.

The previous prime is 231115332499. The next prime is 231115332577. The reversal of 231115332505 is 505233511132.

It can be written as a sum of positive squares in 4 ways, for example, as 95928956176 + 135186376329 = 309724^2 + 367677^2 .

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 231115332505 - 2²⁹ = 230578461593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15472464 + ... + 15487393.

It is an arithmetic number, because the mean of its divisors is an integer number (34690520889).

Almost surely, 2^231115332505 is an apocalyptic number.

It is an amenable number.

231115332505 is a deficient number, since it is larger than the sum of its proper divisors (46408834607).

231115332505 is a wasteful number, since it uses less digits than its factorization.

231115332505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30961355.

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 231115332505 its reverse (505233511132), we get a palindrome (736348843637).

The spelling of 231115332505 in words is "two hundred thirty-one billion, one hundred fifteen million, three hundred thirty-two thousand, five hundred five".