204203144555 has 8 divisors (see below), whose sum is σ = 245064142752. Its totient is φ = 163348936128.

The previous prime is 204203144443. The next prime is 204203144597. The reversal of 204203144555 is 555441302402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204203144555 - 2¹⁰ = 204203143531 is a prime.

It is a super-2 number, since 2×204203144555² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1631039 + ... + 1751768.

It is an arithmetic number, because the mean of its divisors is an integer number (30633017844).

Almost surely, 2^204203144555 is an apocalyptic number.

204203144555 is a deficient number, since it is larger than the sum of its proper divisors (40860998197).

204203144555 is a wasteful number, since it uses less digits than its factorization.

204203144555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3394885.

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 204203144555 its reverse (555441302402), we get a palindrome (759644446957).

The spelling of 204203144555 in words is "two hundred four billion, two hundred three million, one hundred forty-four thousand, five hundred fifty-five".