1443221441 has 4 divisors (see below), whose sum is σ = 1443417300. Its totient is φ = 1443025584.

The previous prime is 1443221407. The next prime is 1443221449. The reversal of 1443221441 is 1441223441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1441223441 = 7 ⋅205889063.

It can be written as a sum of positive squares in 2 ways, for example, as 823460416 + 619761025 = 28696^2 + 24895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1443221441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1443221441.

It is not an unprimeable number, because it can be changed into a prime (1443221449) 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, 86426 + ... + 101763.

It is an arithmetic number, because the mean of its divisors is an integer number (360854325).

Almost surely, 2^1443221441 is an apocalyptic number.

It is an amenable number.

1443221441 is a deficient number, since it is larger than the sum of its proper divisors (195859).

1443221441 is an equidigital number, since it uses as much as digits as its factorization.

1443221441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195858.

The product of its digits is 3072, while the sum is 26.

The square root of 1443221441 is about 37989.7544214226. The cubic root of 1443221441 is about 1130.0846886172.

Adding to 1443221441 its reverse (1441223441), we get a palindrome (2884444882).

The spelling of 1443221441 in words is "one billion, four hundred forty-three million, two hundred twenty-one thousand, four hundred forty-one".