204215494 has 16 divisors (see below), whose sum is σ = 350380800. Its totient is φ = 87446664.

The previous prime is 204215491. The next prime is 204215537. The reversal of 204215494 is 494512402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204215491) by changing a digit.

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, 12937 + ... + 23995.

It is an arithmetic number, because the mean of its divisors is an integer number (21898800).

Almost surely, 2^204215494 is an apocalyptic number.

204215494 is a deficient number, since it is larger than the sum of its proper divisors (146165306).

204215494 is a wasteful number, since it uses less digits than its factorization.

204215494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12387.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 204215494 is about 14290.3986648379. The cubic root of 204215494 is about 588.8837402158.

Adding to 204215494 its reverse (494512402), we get a palindrome (698727896).

The spelling of 204215494 in words is "two hundred four million, two hundred fifteen thousand, four hundred ninety-four".