2031443221 has 4 divisors (see below), whose sum is σ = 2031999372. Its totient is φ = 2030887072.

The previous prime is 2031443207. The next prime is 2031443233. The reversal of 2031443221 is 1223441302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1208327121 + 823116100 = 34761^2 + 28690^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031443221 - 2²³ = 2023054613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2031443192 and 2031443201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031443291) 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, 272560 + ... + 279913.

It is an arithmetic number, because the mean of its divisors is an integer number (507999843).

Almost surely, 2^2031443221 is an apocalyptic number.

It is an amenable number.

2031443221 is a deficient number, since it is larger than the sum of its proper divisors (556151).

2031443221 is an equidigital number, since it uses as much as digits as its factorization.

2031443221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556150.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 2031443221 is about 45071.5344868577. The cubic root of 2031443221 is about 1266.4894101529.

Adding to 2031443221 its reverse (1223441302), we get a palindrome (3254884523).

The spelling of 2031443221 in words is "two billion, thirty-one million, four hundred forty-three thousand, two hundred twenty-one".