1043143221 has 4 divisors (see below), whose sum is σ = 1390857632. Its totient is φ = 695428812.

The previous prime is 1043143193. The next prime is 1043143229. The reversal of 1043143221 is 1223413401.

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 not a de Polignac number, because 1043143221 - 2²⁶ = 976034357 is a prime.

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 (1043143229) 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, 173857201 + ... + 173857206.

It is an arithmetic number, because the mean of its divisors is an integer number (347714408).

Almost surely, 2^1043143221 is an apocalyptic number.

It is an amenable number.

1043143221 is a deficient number, since it is larger than the sum of its proper divisors (347714411).

1043143221 is an equidigital number, since it uses as much as digits as its factorization.

1043143221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347714410.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1043143221 is about 32297.7277993360. The cubic root of 1043143221 is about 1014.1790772192.

Adding to 1043143221 its reverse (1223413401), we get a palindrome (2266556622).

The spelling of 1043143221 in words is "one billion, forty-three million, one hundred forty-three thousand, two hundred twenty-one".