204216842 has 4 divisors (see below), whose sum is σ = 306325266. Its totient is φ = 102108420.

The previous prime is 204216823. The next prime is 204216853. The reversal of 204216842 is 248612402.

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

It can be written as a sum of positive squares in only one way, i.e., 185804161 + 18412681 = 13631^2 + 4291^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51054209 + ... + 51054212.

Almost surely, 2^204216842 is an apocalyptic number.

204216842 is a deficient number, since it is larger than the sum of its proper divisors (102108424).

204216842 is a wasteful number, since it uses less digits than its factorization.

204216842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102108423.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 204216842 is about 14290.4458292945. The cubic root of 204216842 is about 588.8850359280.

The spelling of 204216842 in words is "two hundred four million, two hundred sixteen thousand, eight hundred forty-two".