231134521535666 has 32 divisors (see below), whose sum is σ = 406002970813440. Its totient is φ = 96620898938256.

The previous prime is 231134521535639. The next prime is 231134521535669. The reversal of 231134521535666 is 666535125431132.

It is not an unprimeable number, because it can be changed into a prime (231134521535669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263623136 + ... + 264498443.

It is an arithmetic number, because the mean of its divisors is an integer number (12687592837920).

Almost surely, 2^{231134521535666} is an apocalyptic number.

231134521535666 is a deficient number, since it is larger than the sum of its proper divisors (174868449277774).

231134521535666 is a wasteful number, since it uses less digits than its factorization.

231134521535666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528122358.

The product of its digits is 11664000, while the sum is 53.

Adding to 231134521535666 its reverse (666535125431132), we get a palindrome (897669646966798).

The spelling of 231134521535666 in words is "two hundred thirty-one trillion, one hundred thirty-four billion, five hundred twenty-one million, five hundred thirty-five thousand, six hundred sixty-six".