204172445 has 8 divisors (see below), whose sum is σ = 245234520. Its totient is φ = 163186240.

The previous prime is 204172427. The next prime is 204172469. The reversal of 204172445 is 544271402.

It can be written as a sum of positive squares in 4 ways, for example, as 1907161 + 202265284 = 1381^2 + 14222^2 .

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

It is not a de Polignac number, because 204172445 - 2¹⁴ = 204156061 is a prime.

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, 12866 + ... + 23955.

It is an arithmetic number, because the mean of its divisors is an integer number (30654315).

Almost surely, 2^204172445 is an apocalyptic number.

It is an amenable number.

204172445 is a deficient number, since it is larger than the sum of its proper divisors (41062075).

204172445 is a wasteful number, since it uses less digits than its factorization.

204172445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37935.

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 204172445 is about 14288.8923643507. The cubic root of 204172445 is about 588.8423580510.

The spelling of 204172445 in words is "two hundred four million, one hundred seventy-two thousand, four hundred forty-five".