204510002543 has 32 divisors (see below), whose sum is σ = 266147389440. Its totient is φ = 152379358560.

The previous prime is 204510002531. The next prime is 204510002549. The reversal of 204510002543 is 345200015402.

It is a happy number.

It is not a de Polignac number, because 204510002543 - 2⁴ = 204510002527 is a prime.

It is a super-2 number, since 2×204510002543² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204510002549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5839238 + ... + 5874156.

It is an arithmetic number, because the mean of its divisors is an integer number (8317105920).

Almost surely, 2^204510002543 is an apocalyptic number.

204510002543 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

204510002543 is a deficient number, since it is larger than the sum of its proper divisors (61637386897).

204510002543 is a wasteful number, since it uses less digits than its factorization.

204510002543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38267.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 204510002543 its reverse (345200015402), we get a palindrome (549710017945).

The spelling of 204510002543 in words is "two hundred four billion, five hundred ten million, two thousand, five hundred forty-three".