204034513243 has 4 divisors (see below), whose sum is σ = 222583105368. Its totient is φ = 185485921120.

The previous prime is 204034513237. The next prime is 204034513273. The reversal of 204034513243 is 342315430402.

It is a happy number.

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 204034513243 - 2¹⁷ = 204034382171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204034513223) 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, 9274296046 + ... + 9274296067.

It is an arithmetic number, because the mean of its divisors is an integer number (55645776342).

Almost surely, 2^204034513243 is an apocalyptic number.

204034513243 is a deficient number, since it is larger than the sum of its proper divisors (18548592125).

204034513243 is a wasteful number, since it uses less digits than its factorization.

204034513243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18548592124.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 204034513243 its reverse (342315430402), we get a palindrome (546349943645).

The spelling of 204034513243 in words is "two hundred four billion, thirty-four million, five hundred thirteen thousand, two hundred forty-three".