143640223 has 2 divisors, whose sum is σ = 143640224. Its totient is φ = 143640222.

The previous prime is 143640199. The next prime is 143640227. The reversal of 143640223 is 322046341.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 143640223 - 2⁹ = 143639711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143640227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71820111 + 71820112.

It is an arithmetic number, because the mean of its divisors is an integer number (71820112).

Almost surely, 2^143640223 is an apocalyptic number.

143640223 is a deficient number, since it is larger than the sum of its proper divisors (1).

143640223 is an equidigital number, since it uses as much as digits as its factorization.

143640223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 143640223 is about 11984.9999165624. Note that the first 4 decimals coincide. The cubic root of 143640223 is about 523.7113951302.

Adding to 143640223 its reverse (322046341), we get a palindrome (465686564).

The spelling of 143640223 in words is "one hundred forty-three million, six hundred forty thousand, two hundred twenty-three".