204131145 has 16 divisors (see below), whose sum is σ = 337872960. Its totient is φ = 105115584.

The previous prime is 204131129. The next prime is 204131149. The reversal of 204131145 is 541131402.

It is not a de Polignac number, because 204131145 - 2⁴ = 204131129 is a prime.

It is a super-2 number, since 2×204131145² = 83339048718022050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204131149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234199 + ... + 235068.

It is an arithmetic number, because the mean of its divisors is an integer number (21117060).

Almost surely, 2^204131145 is an apocalyptic number.

It is an amenable number.

204131145 is a deficient number, since it is larger than the sum of its proper divisors (133741815).

204131145 is a wasteful number, since it uses less digits than its factorization.

204131145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469304.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 204131145 is about 14287.4471127630. The cubic root of 204131145 is about 588.8026516983.

Adding to 204131145 its reverse (541131402), we get a palindrome (745262547).

The spelling of 204131145 in words is "two hundred four million, one hundred thirty-one thousand, one hundred forty-five".