205523004143 has 16 divisors (see below), whose sum is σ = 222174239040. Its totient is φ = 189393624576.

The previous prime is 205523004131. The next prime is 205523004151. The reversal of 205523004143 is 341400325502.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 205523004143 - 2⁶ = 205523004079 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 (205523004163) 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, 204593 + ... + 672981.

It is an arithmetic number, because the mean of its divisors is an integer number (13885889940).

Almost surely, 2^205523004143 is an apocalyptic number.

205523004143 is a deficient number, since it is larger than the sum of its proper divisors (16651234897).

205523004143 is a wasteful number, since it uses less digits than its factorization.

205523004143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468946.

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 205523004143 its reverse (341400325502), we get a palindrome (546923329645).

The spelling of 205523004143 in words is "two hundred five billion, five hundred twenty-three million, four thousand, one hundred forty-three".