231145443321 has 16 divisors (see below), whose sum is σ = 331922699136. Its totient is φ = 142234114176.

The previous prime is 231145443259. The next prime is 231145443367. The reversal of 231145443321 is 123344541132.

It is not a de Polignac number, because 231145443321 - 2²⁷ = 231011225593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231145443391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442476 + ... + 811218.

It is an arithmetic number, because the mean of its divisors is an integer number (20745168696).

Almost surely, 2^231145443321 is an apocalyptic number.

It is an amenable number.

231145443321 is a deficient number, since it is larger than the sum of its proper divisors (100777255815).

231145443321 is a wasteful number, since it uses less digits than its factorization.

231145443321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384832.

The product of its digits is 34560, while the sum is 33.

Adding to 231145443321 its reverse (123344541132), we get a palindrome (354489984453).

The spelling of 231145443321 in words is "two hundred thirty-one billion, one hundred forty-five million, four hundred forty-three thousand, three hundred twenty-one".