204223534155 has 24 divisors (see below), whose sum is σ = 358973203680. Its totient is φ = 107385143040.

The previous prime is 204223534111. The next prime is 204223534283. The reversal of 204223534155 is 551435322402.

204223534155 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 235 + 3 + 415 + 5 = 666.

It is not a de Polignac number, because 204223534155 - 2⁶ = 204223534091 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31956670 + ... + 31963059.

It is an arithmetic number, because the mean of its divisors is an integer number (14957216820).

Almost surely, 2^204223534155 is an apocalyptic number.

204223534155 is a deficient number, since it is larger than the sum of its proper divisors (154749669525).

204223534155 is a wasteful number, since it uses less digits than its factorization.

204223534155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63919811 (or 63919808 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 204223534155 its reverse (551435322402), we get a palindrome (755658856557).

The spelling of 204223534155 in words is "two hundred four billion, two hundred twenty-three million, five hundred thirty-four thousand, one hundred fifty-five".