204542542 has 16 divisors (see below), whose sum is σ = 323461152. Its totient is φ = 96814080.

The previous prime is 204542431. The next prime is 204542573. The reversal of 204542542 is 245245402.

It is a self number, because there is not a number n which added to its sum of digits gives 204542542.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18459 + ... + 27382.

It is an arithmetic number, because the mean of its divisors is an integer number (20216322).

Almost surely, 2^204542542 is an apocalyptic number.

204542542 is a deficient number, since it is larger than the sum of its proper divisors (118918610).

204542542 is a wasteful number, since it uses less digits than its factorization.

204542542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45963.

The product of its (nonzero) digits is 12800, while the sum is 28.

The square root of 204542542 is about 14301.8370148733. The cubic root of 204542542 is about 589.1979353263.

Adding to 204542542 its reverse (245245402), we get a palindrome (449787944).

The spelling of 204542542 in words is "two hundred four million, five hundred forty-two thousand, five hundred forty-two".