204531100 has 18 divisors (see below), whose sum is σ = 443832704. Its totient is φ = 81812400.

The previous prime is 204531077. The next prime is 204531127. The reversal of 204531100 is 1135402.

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 1022556 + ... + 1022755.

Almost surely, 2^204531100 is an apocalyptic number.

204531100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204531100 is an abundant number, since it is smaller than the sum of its proper divisors (239301604).

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

204531100 is a wasteful number, since it uses less digits than its factorization.

204531100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045325 (or 2045318 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 204531100 is about 14301.4369907363. The cubic root of 204531100 is about 589.1869486494.

Adding to 204531100 its reverse (1135402), we get a palindrome (205666502).

The spelling of 204531100 in words is "two hundred four million, five hundred thirty-one thousand, one hundred".