204145415 has 4 divisors (see below), whose sum is σ = 244974504. Its totient is φ = 163316328.

The previous prime is 204145351. The next prime is 204145421. The reversal of 204145415 is 514541402.

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

It is a cyclic number.

It is not a de Polignac number, because 204145415 - 2⁶ = 204145351 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 20414537 + ... + 20414546.

It is an arithmetic number, because the mean of its divisors is an integer number (61243626).

Almost surely, 2^204145415 is an apocalyptic number.

204145415 is a deficient number, since it is larger than the sum of its proper divisors (40829089).

204145415 is an equidigital number, since it uses as much as digits as its factorization.

204145415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40829088.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 204145415 is about 14287.9464934608. The cubic root of 204145415 is about 588.8163716659.

Adding to 204145415 its reverse (514541402), we get a palindrome (718686817).

The spelling of 204145415 in words is "two hundred four million, one hundred forty-five thousand, four hundred fifteen".