143321213 has 4 divisors (see below), whose sum is σ = 163795680. Its totient is φ = 122846748.

The previous prime is 143321201. The next prime is 143321231. The reversal of 143321213 is 312123341.

143321213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 312123341 = 199 ⋅1568459.

It is a cyclic number.

It is not a de Polignac number, because 143321213 - 2¹⁰ = 143320189 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 (143321263) 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, 10237223 + ... + 10237236.

It is an arithmetic number, because the mean of its divisors is an integer number (40948920).

Almost surely, 2^143321213 is an apocalyptic number.

It is an amenable number.

143321213 is a deficient number, since it is larger than the sum of its proper divisors (20474467).

143321213 is an equidigital number, since it uses as much as digits as its factorization.

143321213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20474466.

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

The square root of 143321213 is about 11971.6837997000. The cubic root of 143321213 is about 523.3234049081.

Adding to 143321213 its reverse (312123341), we get a palindrome (455444554).

The spelling of 143321213 in words is "one hundred forty-three million, three hundred twenty-one thousand, two hundred thirteen".