231355306555331 has 8 divisors (see below), whose sum is σ = 265168041768960. Its totient is φ = 197733065625288.

The previous prime is 231355306555313. The next prime is 231355306555349. The reversal of 231355306555331 is 133555603553132.

It is an interprime number because it is at equal distance from previous prime (231355306555313) and next prime (231355306555349).

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 231355306555331 - 2⁶ = 231355306555267 is a prime.

It is a super-2 number, since 2×231355306555331² (a number of 30 digits) contains 22 as substring.

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 231355306555331.

It is not an unprimeable number, because it can be changed into a prime (231355306555361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47623568291 + ... + 47623573148.

It is an arithmetic number, because the mean of its divisors is an integer number (33146005221120).

Almost surely, 2^{231355306555331} is an apocalyptic number.

231355306555331 is a deficient number, since it is larger than the sum of its proper divisors (33812735213629).

231355306555331 is an equidigital number, since it uses as much as digits as its factorization.

231355306555331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95247141793.

The product of its (nonzero) digits is 9112500, while the sum is 50.

The spelling of 231355306555331 in words is "two hundred thirty-one trillion, three hundred fifty-five billion, three hundred six million, five hundred fifty-five thousand, three hundred thirty-one".