231886138655 has 8 divisors (see below), whose sum is σ = 278318097792. Its totient is φ = 185472423328.

The previous prime is 231886138633. The next prime is 231886138661. The reversal of 231886138655 is 556831688132.

It is a happy number.

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 231886138655 - 2¹⁰ = 231886137631 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231886138655.

It is a congruent 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, 4532972 + ... + 4583841.

It is an arithmetic number, because the mean of its divisors is an integer number (34789762224).

Almost surely, 2^231886138655 is an apocalyptic number.

231886138655 is a deficient number, since it is larger than the sum of its proper divisors (46431959137).

231886138655 is an equidigital number, since it uses as much as digits as its factorization.

231886138655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9121905.

The product of its digits is 8294400, while the sum is 56.

The spelling of 231886138655 in words is "two hundred thirty-one billion, eight hundred eighty-six million, one hundred thirty-eight thousand, six hundred fifty-five".