204133540 has 24 divisors (see below), whose sum is σ = 461656440. Its totient is φ = 75372288.

The previous prime is 204133529. The next prime is 204133561. The reversal of 204133540 is 45331402.

It can be written as a sum of positive squares in 4 ways, for example, as 443556 + 203689984 = 666^2 + 14272^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392305 + ... + 392824.

It is an arithmetic number, because the mean of its divisors is an integer number (19235685).

Almost surely, 2^204133540 is an apocalyptic number.

204133540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204133540 is an abundant number, since it is smaller than the sum of its proper divisors (257522900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204133540 is a wasteful number, since it uses less digits than its factorization.

204133540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785151 (or 785149 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 204133540 is about 14287.5309273506. The cubic root of 204133540 is about 588.8049544285.

Adding to 204133540 its reverse (45331402), we get a palindrome (249464942).

The spelling of 204133540 in words is "two hundred four million, one hundred thirty-three thousand, five hundred forty".