1442433221 has 4 divisors (see below), whose sum is σ = 1527282252. Its totient is φ = 1357584192.

The previous prime is 1442433211. The next prime is 1442433227. The reversal of 1442433221 is 1223342441.

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 652036225 + 790396996 = 25535^2 + 28114^2 .

It is a cyclic number.

It is not a de Polignac number, because 1442433221 - 2²² = 1438238917 is a prime.

It is a super-2 number, since 2×1442433221² = 4161227194088869682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1442433227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42424490 + ... + 42424523.

It is an arithmetic number, because the mean of its divisors is an integer number (381820563).

Almost surely, 2^1442433221 is an apocalyptic number.

It is an amenable number.

1442433221 is a deficient number, since it is larger than the sum of its proper divisors (84849031).

1442433221 is an equidigital number, since it uses as much as digits as its factorization.

1442433221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84849030.

The product of its digits is 4608, while the sum is 26.

The square root of 1442433221 is about 37979.3788917091. The cubic root of 1442433221 is about 1129.8789180310.

Adding to 1442433221 its reverse (1223342441), we get a palindrome (2665775662).

The spelling of 1442433221 in words is "one billion, four hundred forty-two million, four hundred thirty-three thousand, two hundred twenty-one".