143221133 has 4 divisors (see below), whose sum is σ = 156241248. Its totient is φ = 130201020.

The previous prime is 143221123. The next prime is 143221153. The reversal of 143221133 is 331122341.

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, and also an emirpimes, since its reverse is a distinct semiprime: 331122341 = 11 ⋅30102031.

It is a cyclic number.

It is not a de Polignac number, because 143221133 - 2¹⁰ = 143220109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143221123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6510041 + ... + 6510062.

It is an arithmetic number, because the mean of its divisors is an integer number (39060312).

Almost surely, 2^143221133 is an apocalyptic number.

It is an amenable number.

143221133 is a deficient number, since it is larger than the sum of its proper divisors (13020115).

143221133 is a wasteful number, since it uses less digits than its factorization.

143221133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13020114.

The product of its digits is 432, while the sum is 20.

The square root of 143221133 is about 11967.5032066008. The cubic root of 143221133 is about 523.2015657636.

Adding to 143221133 its reverse (331122341), we get a palindrome (474343474).

The spelling of 143221133 in words is "one hundred forty-three million, two hundred twenty-one thousand, one hundred thirty-three".