205315199 has 2 divisors, whose sum is σ = 205315200. Its totient is φ = 205315198.

The previous prime is 205315169. The next prime is 205315211. The reversal of 205315199 is 991513502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205315199 - 2²⁴ = 188537983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205315169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102657599 + 102657600.

It is an arithmetic number, because the mean of its divisors is an integer number (102657600).

Almost surely, 2^205315199 is an apocalyptic number.

205315199 is a deficient number, since it is larger than the sum of its proper divisors (1).

205315199 is an equidigital number, since it uses as much as digits as its factorization.

205315199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 205315199 is about 14328.8240620087. The cubic root of 205315199 is about 589.9388991595.

The spelling of 205315199 in words is "two hundred five million, three hundred fifteen thousand, one hundred ninety-nine".