204351035551 has 16 divisors (see below), whose sum is σ = 222950224000. Its totient is φ = 186165278208.

The previous prime is 204351035519. The next prime is 204351035569. The reversal of 204351035551 is 155530153402.

It is not a de Polignac number, because 204351035551 - 2⁵ = 204351035519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204351035501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2461975 + ... + 2543623.

It is an arithmetic number, because the mean of its divisors is an integer number (13934389000).

Almost surely, 2^204351035551 is an apocalyptic number.

204351035551 is a deficient number, since it is larger than the sum of its proper divisors (18599188449).

204351035551 is a wasteful number, since it uses less digits than its factorization.

204351035551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84178.

The product of its (nonzero) digits is 45000, while the sum is 34.

Adding to 204351035551 its reverse (155530153402), we get a palindrome (359881188953).

The spelling of 204351035551 in words is "two hundred four billion, three hundred fifty-one million, thirty-five thousand, five hundred fifty-one".