204231145 has 16 divisors (see below), whose sum is σ = 259345152. Its totient is φ = 154073920.

The previous prime is 204231109. The next prime is 204231161. The reversal of 204231145 is 541132402.

It is not a de Polignac number, because 204231145 - 2⁷ = 204231017 is a prime.

It is a super-2 number, since 2×204231145² = 83420721176022050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 4342 + ... + 20671.

It is an arithmetic number, because the mean of its divisors is an integer number (16209072).

Almost surely, 2^204231145 is an apocalyptic number.

It is an amenable number.

204231145 is a deficient number, since it is larger than the sum of its proper divisors (55114007).

204231145 is a wasteful number, since it uses less digits than its factorization.

204231145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25112.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 204231145 is about 14290.9462597828. The cubic root of 204231145 is about 588.8987837756.

Adding to 204231145 its reverse (541132402), we get a palindrome (745363547).

The spelling of 204231145 in words is "two hundred four million, two hundred thirty-one thousand, one hundred forty-five".