204541391 has 4 divisors (see below), whose sum is σ = 204733800. Its totient is φ = 204348984.

The previous prime is 204541387. The next prime is 204541427. The reversal of 204541391 is 193145402.

204541391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 204541391 - 2² = 204541387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204541361) 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, 94601 + ... + 96738.

It is an arithmetic number, because the mean of its divisors is an integer number (51183450).

Almost surely, 2^204541391 is an apocalyptic number.

204541391 is a deficient number, since it is larger than the sum of its proper divisors (192409).

204541391 is a wasteful number, since it uses less digits than its factorization.

204541391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192408.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 204541391 is about 14301.7967752307. The cubic root of 204541391 is about 589.1968301478.

Adding to 204541391 its reverse (193145402), we get a palindrome (397686793).

The spelling of 204541391 in words is "two hundred four million, five hundred forty-one thousand, three hundred ninety-one".