143228231 has 2 divisors, whose sum is σ = 143228232. Its totient is φ = 143228230.

The previous prime is 143228219. The next prime is 143228237. The reversal of 143228231 is 132822341.

143228231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 143228231 - 2²² = 139033927 is a prime.

It is a super-2 number, since 2×143228231² = 41028652310778722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143228231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143228237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71614115 + 71614116.

It is an arithmetic number, because the mean of its divisors is an integer number (71614116).

Almost surely, 2^143228231 is an apocalyptic number.

143228231 is a deficient number, since it is larger than the sum of its proper divisors (1).

143228231 is an equidigital number, since it uses as much as digits as its factorization.

143228231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 26.

The square root of 143228231 is about 11967.7997560120. The cubic root of 143228231 is about 523.2102088628.

The spelling of 143228231 in words is "one hundred forty-three million, two hundred twenty-eight thousand, two hundred thirty-one".