205165147 has 4 divisors (see below), whose sum is σ = 223816536. Its totient is φ = 186513760.

The previous prime is 205165139. The next prime is 205165151. The reversal of 205165147 is 741561502.

205165147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 205165147 - 2³ = 205165139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205165447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9325678 + ... + 9325699.

It is an arithmetic number, because the mean of its divisors is an integer number (55954134).

Almost surely, 2^205165147 is an apocalyptic number.

205165147 is a deficient number, since it is larger than the sum of its proper divisors (18651389).

205165147 is a wasteful number, since it uses less digits than its factorization.

205165147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18651388.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 205165147 is about 14323.5870856430. The cubic root of 205165147 is about 589.7951476889.

The spelling of 205165147 in words is "two hundred five million, one hundred sixty-five thousand, one hundred forty-seven".