143240213 has 4 divisors (see below), whose sum is σ = 144285900. Its totient is φ = 142194528.

The previous prime is 143240203. The next prime is 143240219. The reversal of 143240213 is 312042341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312042341 = 13 ⋅24003257.

It can be written as a sum of positive squares in 2 ways, for example, as 93354244 + 49885969 = 9662^2 + 7063^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143240213 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 (143240219) 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, 522638 + ... + 522911.

It is an arithmetic number, because the mean of its divisors is an integer number (36071475).

Almost surely, 2^143240213 is an apocalyptic number.

It is an amenable number.

143240213 is a deficient number, since it is larger than the sum of its proper divisors (1045687).

143240213 is a wasteful number, since it uses less digits than its factorization.

143240213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045686.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 143240213 is about 11968.3003388117. The cubic root of 143240213 is about 523.2247984677.

Adding to 143240213 its reverse (312042341), we get a palindrome (455282554).

The spelling of 143240213 in words is "one hundred forty-three million, two hundred forty thousand, two hundred thirteen".