1442333221 has 4 divisors (see below), whose sum is σ = 1648380832. Its totient is φ = 1236285612.

The previous prime is 1442333209. The next prime is 1442333231. The reversal of 1442333221 is 1223332441.

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 not a de Polignac number, because 1442333221 - 2⁷ = 1442333093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1442333231) 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, 103023795 + ... + 103023808.

It is an arithmetic number, because the mean of its divisors is an integer number (412095208).

Almost surely, 2^1442333221 is an apocalyptic number.

It is an amenable number.

1442333221 is a deficient number, since it is larger than the sum of its proper divisors (206047611).

1442333221 is an equidigital number, since it uses as much as digits as its factorization.

1442333221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206047610.

The product of its digits is 3456, while the sum is 25.

The square root of 1442333221 is about 37978.0623650022. The cubic root of 1442333221 is about 1129.8528069429.

Adding to 1442333221 its reverse (1223332441), we get a palindrome (2665665662).

The spelling of 1442333221 in words is "one billion, four hundred forty-two million, three hundred thirty-three thousand, two hundred twenty-one".