204243100133 has 4 divisors (see below), whose sum is σ = 204251255628. Its totient is φ = 204234944640.

The previous prime is 204243100073. The next prime is 204243100141. The reversal of 204243100133 is 331001342402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331001342402 = 2 ⋅165500671201.

It can be written as a sum of positive squares in 2 ways, for example, as 162169706209 + 42073393924 = 402703^2 + 205118^2 .

It is a cyclic number.

It is not a de Polignac number, because 204243100133 - 2¹² = 204243096037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 204243100099 and 204243100108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204243105133) 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, 4040066 + ... + 4090307.

It is an arithmetic number, because the mean of its divisors is an integer number (51062813907).

Almost surely, 2^204243100133 is an apocalyptic number.

It is an amenable number.

204243100133 is a deficient number, since it is larger than the sum of its proper divisors (8155495).

204243100133 is an equidigital number, since it uses as much as digits as its factorization.

204243100133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8155494.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 204243100133 its reverse (331001342402), we get a palindrome (535244442535).

The spelling of 204243100133 in words is "two hundred four billion, two hundred forty-three million, one hundred thousand, one hundred thirty-three".