205306193 has 4 divisors (see below), whose sum is σ = 206493108. Its totient is φ = 204119280.

The previous prime is 205306183. The next prime is 205306237. The reversal of 205306193 is 391603502.

205306193 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, and also an emirpimes, since its reverse is a distinct semiprime: 391603502 = 2 ⋅195801751.

It can be written as a sum of positive squares in 2 ways, for example, as 188430529 + 16875664 = 13727^2 + 4108^2 .

It is a cyclic number.

It is not a de Polignac number, because 205306193 - 2⁴ = 205306177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205306183) 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, 593198 + ... + 593543.

It is an arithmetic number, because the mean of its divisors is an integer number (51623277).

Almost surely, 2^205306193 is an apocalyptic number.

It is an amenable number.

205306193 is a deficient number, since it is larger than the sum of its proper divisors (1186915).

205306193 is a wasteful number, since it uses less digits than its factorization.

205306193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186914.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 205306193 is about 14328.5097969049. The cubic root of 205306193 is about 589.9302732883.

Adding to 205306193 its reverse (391603502), we get a palindrome (596909695).

The spelling of 205306193 in words is "two hundred five million, three hundred six thousand, one hundred ninety-three".