205533540203 has 4 divisors (see below), whose sum is σ = 207033785160. Its totient is φ = 204033295248.

The previous prime is 205533540197. The next prime is 205533540227. The reversal of 205533540203 is 302045335502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205533540203 - 2⁴ = 205533540187 is a prime.

It is a super-2 number, since 2×205533540203² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205533540203.

It is not an unprimeable number, because it can be changed into a prime (205533540283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750122273 + ... + 750122546.

It is an arithmetic number, because the mean of its divisors is an integer number (51758446290).

Almost surely, 2^205533540203 is an apocalyptic number.

205533540203 is a deficient number, since it is larger than the sum of its proper divisors (1500244957).

205533540203 is a wasteful number, since it uses less digits than its factorization.

205533540203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500244956.

The product of its (nonzero) digits is 54000, while the sum is 32.

Adding to 205533540203 its reverse (302045335502), we get a palindrome (507578875705).

The spelling of 205533540203 in words is "two hundred five billion, five hundred thirty-three million, five hundred forty thousand, two hundred three".