204640115 has 8 divisors (see below), whose sum is σ = 250793280. Its totient is φ = 160228672.

The previous prime is 204640087. The next prime is 204640133. The reversal of 204640115 is 511046402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204640115 is a prime.

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, 435170 + ... + 435639.

It is an arithmetic number, because the mean of its divisors is an integer number (31349160).

Almost surely, 2^204640115 is an apocalyptic number.

204640115 is a deficient number, since it is larger than the sum of its proper divisors (46153165).

204640115 is an equidigital number, since it uses as much as digits as its factorization.

204640115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870861.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 204640115 is about 14305.2478133026. The cubic root of 204640115 is about 589.2916088649.

Adding to 204640115 its reverse (511046402), we get a palindrome (715686517).

The spelling of 204640115 in words is "two hundred four million, six hundred forty thousand, one hundred fifteen".