204252522155 has 32 divisors (see below), whose sum is σ = 281816789760. Its totient is φ = 140549627520.

The previous prime is 204252522107. The next prime is 204252522157. The reversal of 204252522155 is 551225252402.

It is not a de Polignac number, because 204252522155 - 2¹⁴ = 204252505771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204252522157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 698237 + ... + 946593.

It is an arithmetic number, because the mean of its divisors is an integer number (8806774680).

Almost surely, 2^204252522155 is an apocalyptic number.

204252522155 is a deficient number, since it is larger than the sum of its proper divisors (77564267605).

204252522155 is a wasteful number, since it uses less digits than its factorization.

204252522155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249179.

The product of its (nonzero) digits is 80000, while the sum is 35.

Adding to 204252522155 its reverse (551225252402), we get a palindrome (755477774557).

The spelling of 204252522155 in words is "two hundred four billion, two hundred fifty-two million, five hundred twenty-two thousand, one hundred fifty-five".