205030143 has 16 divisors (see below), whose sum is σ = 305939200. Its totient is φ = 135700920.

The previous prime is 205030141. The next prime is 205030151. The reversal of 205030143 is 341030502.

205030143 is a `hidden beast` number, since 20 + 503 + 0 + 143 = 666.

It is not a de Polignac number, because 205030143 - 2¹ = 205030141 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 (205030141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23563 + ... + 31068.

It is an arithmetic number, because the mean of its divisors is an integer number (19121200).

Almost surely, 2^205030143 is an apocalyptic number.

205030143 is a deficient number, since it is larger than the sum of its proper divisors (100909057).

205030143 is a wasteful number, since it uses less digits than its factorization.

205030143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54779 (or 54773 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 205030143 is about 14318.8736638047. The cubic root of 205030143 is about 589.6657524566.

Adding to 205030143 its reverse (341030502), we get a palindrome (546060645).

The spelling of 205030143 in words is "two hundred five million, thirty thousand, one hundred forty-three".