231421304444 has 36 divisors (see below), whose sum is σ = 449558844504. Its totient is φ = 104149980000.

The previous prime is 231421304437. The next prime is 231421304447. The reversal of 231421304444 is 444403124132.

It is a self number, because there is not a number n which added to its sum of digits gives 231421304444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231421304447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2318162 + ... + 2415929.

Almost surely, 2^231421304444 is an apocalyptic number.

It is an amenable number.

231421304444 is a deficient number, since it is larger than the sum of its proper divisors (218137540060).

231421304444 is a wasteful number, since it uses less digits than its factorization.

231421304444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4734218 (or 4734205 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 231421304444 its reverse (444403124132), we get a palindrome (675824428576).

The spelling of 231421304444 in words is "two hundred thirty-one billion, four hundred twenty-one million, three hundred four thousand, four hundred forty-four".