204213445 has 8 divisors (see below), whose sum is σ = 246524544. Its totient is φ = 162391824.

The previous prime is 204213413. The next prime is 204213479. The reversal of 204213445 is 544312402.

It is a happy number.

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 204213445 - 2⁵ = 204213413 is a prime.

It is a super-2 number, since 2×204213445² = 83406262237536050, which contains 22 as substring.

It is a Duffinian number.

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, 121449 + ... + 123118.

It is an arithmetic number, because the mean of its divisors is an integer number (30815568).

Almost surely, 2^204213445 is an apocalyptic number.

It is an amenable number.

204213445 is a deficient number, since it is larger than the sum of its proper divisors (42311099).

204213445 is a wasteful number, since it uses less digits than its factorization.

204213445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244739.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 204213445 is about 14290.3269731661. The cubic root of 204213445 is about 588.8817706838.

Adding to 204213445 its reverse (544312402), we get a palindrome (748525847).

The spelling of 204213445 in words is "two hundred four million, two hundred thirteen thousand, four hundred forty-five".