204561256 has 16 divisors (see below), whose sum is σ = 384921540. Its totient is φ = 101915520.

The previous prime is 204561223. The next prime is 204561283. The reversal of 204561256 is 652165402.

It can be written as a sum of positive squares in 2 ways, for example, as 195160900 + 9400356 = 13970^2 + 3066^2 .

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 3 ways as a sum of consecutive naturals, for example, 43251 + ... + 47746.

Almost surely, 2^204561256 is an apocalyptic number.

It is an amenable number.

204561256 is a deficient number, since it is larger than the sum of its proper divisors (180360284).

204561256 is a wasteful number, since it uses less digits than its factorization.

204561256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91284 (or 91280 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 204561256 is about 14302.4912515268. The cubic root of 204561256 is about 589.2159037382.

It can be divided in two parts, 20456 and 1256, that added together give a palindrome (21712).

The spelling of 204561256 in words is "two hundred four million, five hundred sixty-one thousand, two hundred fifty-six".