231115505 has 8 divisors (see below), whose sum is σ = 284834472. Its totient is φ = 179895168.

The previous prime is 231115499. The next prime is 231115513. The reversal of 231115505 is 505511132.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 121264144 + 109851361 = 11012^2 + 10481^2 .

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 231115505 - 2¹² = 231111409 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, 624452 + ... + 624821.

It is an arithmetic number, because the mean of its divisors is an integer number (35604309).

Almost surely, 2^231115505 is an apocalyptic number.

It is an amenable number.

231115505 is a deficient number, since it is larger than the sum of its proper divisors (53718967).

231115505 is a wasteful number, since it uses less digits than its factorization.

231115505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249315.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 231115505 is about 15202.4835142157. The cubic root of 231115505 is about 613.6814945599.

Adding to 231115505 its reverse (505511132), we get a palindrome (736626637).

The spelling of 231115505 in words is "two hundred thirty-one million, one hundred fifteen thousand, five hundred five".