205145867 has 8 divisors (see below), whose sum is σ = 208766400. Its totient is φ = 201533760.

The previous prime is 205145861. The next prime is 205145873. The reversal of 205145867 is 768541502.

It is an interprime number because it is at equal distance from previous prime (205145861) and next prime (205145873).

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

It is a cyclic number.

It is not a de Polignac number, because 205145867 - 2¹⁶ = 205080331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205145867.

It is not an unprimeable number, because it can be changed into a prime (205145861) 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 7 ways as a sum of consecutive naturals, for example, 65759 + ... + 68807.

It is an arithmetic number, because the mean of its divisors is an integer number (26095800).

Almost surely, 2^205145867 is an apocalyptic number.

205145867 is a deficient number, since it is larger than the sum of its proper divisors (3620533).

205145867 is a wasteful number, since it uses less digits than its factorization.

205145867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4213.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 205145867 is about 14322.9140540604. The cubic root of 205145867 is about 589.7766721553.

The spelling of 205145867 in words is "two hundred five million, one hundred forty-five thousand, eight hundred sixty-seven".