143243231 has 4 divisors (see below), whose sum is σ = 143970552. Its totient is φ = 142515912.

The previous prime is 143243203. The next prime is 143243239. The reversal of 143243231 is 132342341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132342341 = 29 ⋅4563529.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143243231 is a prime.

It is a super-2 number, since 2×143243231² = 41037246454638722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 143243197 and 143243206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143243239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363365 + ... + 363758.

It is an arithmetic number, because the mean of its divisors is an integer number (35992638).

Almost surely, 2^143243231 is an apocalyptic number.

143243231 is a deficient number, since it is larger than the sum of its proper divisors (727321).

143243231 is an equidigital number, since it uses as much as digits as its factorization.

143243231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727320.

The product of its digits is 1728, while the sum is 23.

The square root of 143243231 is about 11968.4264212134. The cubic root of 143243231 is about 523.2284731373.

Adding to 143243231 its reverse (132342341), we get a palindrome (275585572).

The spelling of 143243231 in words is "one hundred forty-three million, two hundred forty-three thousand, two hundred thirty-one".