204561443 has 4 divisors (see below), whose sum is σ = 204750720. Its totient is φ = 204372168.

The previous prime is 204561439. The next prime is 204561491. The reversal of 204561443 is 344165402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204561443 - 2² = 204561439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204561433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93008 + ... + 95181.

It is an arithmetic number, because the mean of its divisors is an integer number (51187680).

Almost surely, 2^204561443 is an apocalyptic number.

204561443 is a deficient number, since it is larger than the sum of its proper divisors (189277).

204561443 is a wasteful number, since it uses less digits than its factorization.

204561443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189276.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 204561443 is about 14302.4977888479. The cubic root of 204561443 is about 589.2160832823.

The spelling of 204561443 in words is "two hundred four million, five hundred sixty-one thousand, four hundred forty-three".