It is a self number, because there is not a number n which added to its sum of digits gives 204155521322522.
It is an unprimeable number.
Almost surely, 2204155521322522 is an apocalyptic number.
204155521322522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.
204155521322522 is a wasteful number, since it uses less digits than its factorization.
204155521322522 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 434223915.
Adding to 204155521322522 its reverse (225223125551402), we get a palindrome (429378646873924).
The spelling of 204155521322522 in words is "two hundred four trillion, one hundred fifty-five billion, five hundred twenty-one million, three hundred twenty-two thousand, five hundred twenty-two".