1443223221 has 32 divisors (see below), whose sum is σ = 2163088896. Its totient is φ = 848232000.

The previous prime is 1443223189. The next prime is 1443223241. The reversal of 1443223221 is 1223223441.

It is a happy number.

It is not a de Polignac number, because 1443223221 - 2⁵ = 1443223189 is a prime.

It is a super-2 number, since 2×1443223221² = 4165786531267229682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1443223191 and 1443223200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1443223241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 402366 + ... + 405936.

It is an arithmetic number, because the mean of its divisors is an integer number (67596528).

Almost surely, 2^1443223221 is an apocalyptic number.

1443223221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1443223221 is a deficient number, since it is larger than the sum of its proper divisors (719865675).

1443223221 is a wasteful number, since it uses less digits than its factorization.

1443223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3953.

The product of its digits is 2304, while the sum is 24.

The square root of 1443223221 is about 37989.7778487845. Note that the first 3 decimals coincide. The cubic root of 1443223221 is about 1130.0851532144.

Adding to 1443223221 its reverse (1223223441), we get a palindrome (2666446662).

The spelling of 1443223221 in words is "one billion, four hundred forty-three million, two hundred twenty-three thousand, two hundred twenty-one".