205315169 has 2 divisors, whose sum is σ = 205315170. Its totient is φ = 205315168.

The previous prime is 205315133. The next prime is 205315199. The reversal of 205315169 is 961513502.

205315169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117180625 + 88134544 = 10825^2 + 9388^2 .

It is a cyclic number.

It is not a de Polignac number, because 205315169 - 2¹⁶ = 205249633 is a prime.

It is a super-2 number, since 2×205315169² = 84308637242997122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (205315199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102657584 + 102657585.

It is an arithmetic number, because the mean of its divisors is an integer number (102657585).

Almost surely, 2^205315169 is an apocalyptic number.

It is an amenable number.

205315169 is a deficient number, since it is larger than the sum of its proper divisors (1).

205315169 is an equidigital number, since it uses as much as digits as its factorization.

205315169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 205315169 is about 14328.8230151677. The cubic root of 205315169 is about 589.9388704262.

The spelling of 205315169 in words is "two hundred five million, three hundred fifteen thousand, one hundred sixty-nine".