231430340221 has 8 divisors (see below), whose sum is σ = 233701295360. Its totient is φ = 229159847952.

The previous prime is 231430340213. The next prime is 231430340233. The reversal of 231430340221 is 122043034132.

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 231430340221 - 2³ = 231430340213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231430340321) 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 7 ways as a sum of consecutive naturals, for example, 935791 + ... + 1156963.

It is an arithmetic number, because the mean of its divisors is an integer number (29212661920).

Almost surely, 2^231430340221 is an apocalyptic number.

It is an amenable number.

231430340221 is a deficient number, since it is larger than the sum of its proper divisors (2270955139).

231430340221 is a wasteful number, since it uses less digits than its factorization.

231430340221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231435.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 231430340221 its reverse (122043034132), we get a palindrome (353473374353).

The spelling of 231430340221 in words is "two hundred thirty-one billion, four hundred thirty million, three hundred forty thousand, two hundred twenty-one".