204224135 has 4 divisors (see below), whose sum is σ = 245068968. Its totient is φ = 163379304.

The previous prime is 204224129. The next prime is 204224149. The reversal of 204224135 is 531422402.

It is a happy number.

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 204224135 - 2¹² = 204220039 is a prime.

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 204224135.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20422409 + ... + 20422418.

It is an arithmetic number, because the mean of its divisors is an integer number (61267242).

Almost surely, 2^204224135 is an apocalyptic number.

204224135 is a deficient number, since it is larger than the sum of its proper divisors (40844833).

204224135 is an equidigital number, since it uses as much as digits as its factorization.

204224135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40844832.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 204224135 is about 14290.7009975018. The cubic root of 204224135 is about 588.8920459399.

Adding to 204224135 its reverse (531422402), we get a palindrome (735646537).

The spelling of 204224135 in words is "two hundred four million, two hundred twenty-four thousand, one hundred thirty-five".