231443014221 has 12 divisors (see below), whose sum is σ = 334337520348. Its totient is φ = 154281060864.

The previous prime is 231443014213. The next prime is 231443014279. The reversal of 231443014221 is 122410344132.

231443014221 is a `hidden beast` number, since 2 + 3 + 1 + 4 + 430 + 1 + 4 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 103861175625 + 127581838596 = 322275^2 + 357186^2 .

It is not a de Polignac number, because 231443014221 - 2³ = 231443014213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231443014211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1087060 + ... + 1282413.

It is an arithmetic number, because the mean of its divisors is an integer number (27861460029).

Almost surely, 2^231443014221 is an apocalyptic number.

It is an amenable number.

231443014221 is a deficient number, since it is larger than the sum of its proper divisors (102894506127).

231443014221 is a wasteful number, since it uses less digits than its factorization.

231443014221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380332 (or 2380329 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 231443014221 its reverse (122410344132), we get a palindrome (353853358353).

The spelling of 231443014221 in words is "two hundred thirty-one billion, four hundred forty-three million, fourteen thousand, two hundred twenty-one".