4243440231321 has 4 divisors (see below), whose sum is σ = 5657920308432. Its totient is φ = 2828960154212.

The previous prime is 4243440231313. The next prime is 4243440231341. The reversal of 4243440231321 is 1231320443424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4243440231321 - 2³ = 4243440231313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4243440231341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 707240038551 + ... + 707240038556.

It is an arithmetic number, because the mean of its divisors is an integer number (1414480077108).

Almost surely, 2^{4243440231321} is an apocalyptic number.

It is an amenable number.

4243440231321 is a deficient number, since it is larger than the sum of its proper divisors (1414480077111).

4243440231321 is a wasteful number, since it uses less digits than its factorization.

4243440231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414480077110.

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 4243440231321 its reverse (1231320443424), we get a palindrome (5474760674745).

The spelling of 4243440231321 in words is "four trillion, two hundred forty-three billion, four hundred forty million, two hundred thirty-one thousand, three hundred twenty-one".