4040231321 has 4 divisors (see below), whose sum is σ = 4617407232. Its totient is φ = 3463055412.

The previous prime is 4040231263. The next prime is 4040231399. The reversal of 4040231321 is 1231320404.

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 a de Polignac number, because none of the positive numbers 2^k-4040231321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4040231293 and 4040231302.

It is not an unprimeable number, because it can be changed into a prime (4040261321) 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, 288587945 + ... + 288587958.

It is an arithmetic number, because the mean of its divisors is an integer number (1154351808).

Almost surely, 2^4040231321 is an apocalyptic number.

It is an amenable number.

4040231321 is a deficient number, since it is larger than the sum of its proper divisors (577175911).

4040231321 is an equidigital number, since it uses as much as digits as its factorization.

4040231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577175910.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 4040231321 is about 63562.8139795588. The cubic root of 4040231321 is about 1592.7052453964.

Adding to 4040231321 its reverse (1231320404), we get a palindrome (5271551725).

The spelling of 4040231321 in words is "four billion, forty million, two hundred thirty-one thousand, three hundred twenty-one".