204145355 has 32 divisors (see below), whose sum is σ = 271071360. Its totient is φ = 147051520.

The previous prime is 204145351. The next prime is 204145421. The reversal of 204145355 is 553541402.

It is not a de Polignac number, because 204145355 - 2² = 204145351 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (204145351) 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, 135989 + ... + 137481.

It is an arithmetic number, because the mean of its divisors is an integer number (8470980).

Almost surely, 2^204145355 is an apocalyptic number.

204145355 is a deficient number, since it is larger than the sum of its proper divisors (66926005).

204145355 is a wasteful number, since it uses less digits than its factorization.

204145355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 204145355 is about 14287.9443937888. The cubic root of 204145355 is about 588.8163139799.

Adding to 204145355 its reverse (553541402), we get a palindrome (757686757).

The spelling of 204145355 in words is "two hundred four million, one hundred forty-five thousand, three hundred fifty-five".