1444531221 has 36 divisors (see below), whose sum is σ = 2554968000. Its totient is φ = 781997328.

The previous prime is 1444531213. The next prime is 1444531223. The reversal of 1444531221 is 1221354441.

It is not a de Polignac number, because 1444531221 - 2³ = 1444531213 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444531223) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 77821 + ... + 94578.

Almost surely, 2^1444531221 is an apocalyptic number.

It is an amenable number.

1444531221 is a deficient number, since it is larger than the sum of its proper divisors (1110436779).

1444531221 is a wasteful number, since it uses less digits than its factorization.

1444531221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172438 (or 172428 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 1444531221 is about 38006.9891072682. The cubic root of 1444531221 is about 1130.4264506269.

Adding to 1444531221 its reverse (1221354441), we get a palindrome (2665885662).

The spelling of 1444531221 in words is "one billion, four hundred forty-four million, five hundred thirty-one thousand, two hundred twenty-one".