229686143 has 2 divisors, whose sum is σ = 229686144. Its totient is φ = 229686142.

The previous prime is 229686139. The next prime is 229686179. The reversal of 229686143 is 341686922.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 229686143 - 2² = 229686139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 229686143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229686103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114843071 + 114843072.

It is an arithmetic number, because the mean of its divisors is an integer number (114843072).

Almost surely, 2^229686143 is an apocalyptic number.

229686143 is a deficient number, since it is larger than the sum of its proper divisors (1).

229686143 is an equidigital number, since it uses as much as digits as its factorization.

229686143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 41.

The square root of 229686143 is about 15155.3997967721. The cubic root of 229686143 is about 612.4137481212.

The spelling of 229686143 in words is "two hundred twenty-nine million, six hundred eighty-six thousand, one hundred forty-three".