204515147 has 4 divisors (see below), whose sum is σ = 206813160. Its totient is φ = 202217136.

The previous prime is 204515137. The next prime is 204515159. The reversal of 204515147 is 741515402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 741515402 = 2 ⋅370757701.

It is a cyclic number.

It is not a de Polignac number, because 204515147 - 2⁴ = 204515131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204515137) by changing a digit.

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, 1148873 + ... + 1149050.

It is an arithmetic number, because the mean of its divisors is an integer number (51703290).

Almost surely, 2^204515147 is an apocalyptic number.

204515147 is a deficient number, since it is larger than the sum of its proper divisors (2298013).

204515147 is an equidigital number, since it uses as much as digits as its factorization.

204515147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298012.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 204515147 is about 14300.8792387042. The cubic root of 204515147 is about 589.1716297993.

The spelling of 204515147 in words is "two hundred four million, five hundred fifteen thousand, one hundred forty-seven".