204816445 has 8 divisors (see below), whose sum is σ = 245874744. Its totient is φ = 163789824.

The previous prime is 204816421. The next prime is 204816457. The reversal of 204816445 is 544618402.

It can be written as a sum of positive squares in 4 ways, for example, as 99261369 + 105555076 = 9963^2 + 10274^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204816445 - 2⁵ = 204816413 is a prime.

It is a super-2 number, since 2×204816445² = 83899552284876050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204816445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9997 + ... + 22573.

It is an arithmetic number, because the mean of its divisors is an integer number (30734343).

Almost surely, 2^204816445 is an apocalyptic number.

It is an amenable number.

204816445 is a deficient number, since it is larger than the sum of its proper divisors (41058299).

204816445 is a wasteful number, since it uses less digits than its factorization.

204816445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15839.

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 204816445 is about 14311.4096091196. The cubic root of 204816445 is about 589.4608164170.

The spelling of 204816445 in words is "two hundred four million, eight hundred sixteen thousand, four hundred forty-five".