1444343221 has 2 divisors, whose sum is σ = 1444343222. Its totient is φ = 1444343220.

The previous prime is 1444343191. The next prime is 1444343233. The reversal of 1444343221 is 1223434441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 742835025 + 701508196 = 27255^2 + 26486^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444343221 - 2⁵ = 1444343189 is a prime.

It is a super-2 number, since 2×1444343221² = 4172254680097309682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1444343221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1444343291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722171610 + 722171611.

It is an arithmetic number, because the mean of its divisors is an integer number (722171611).

Almost surely, 2^1444343221 is an apocalyptic number.

It is an amenable number.

1444343221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444343221 is an equidigital number, since it uses as much as digits as its factorization.

1444343221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 28.

The square root of 1444343221 is about 38004.5157974681. The cubic root of 1444343221 is about 1130.3774083287.

Adding to 1444343221 its reverse (1223434441), we get a palindrome (2667777662).

The spelling of 1444343221 in words is "one billion, four hundred forty-four million, three hundred forty-three thousand, two hundred twenty-one".