205903205 has 4 divisors (see below), whose sum is σ = 247083852. Its totient is φ = 164722560.

The previous prime is 205903183. The next prime is 205903211. The reversal of 205903205 is 502309502.

205903205 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 can be written as a sum of positive squares in 2 ways, for example, as 38925121 + 166978084 = 6239^2 + 12922^2 .

It is not a de Polignac number, because 205903205 - 2⁶ = 205903141 is a prime.

It is a super-2 number, since 2×205903205² = 84792259658544050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20590316 + ... + 20590325.

It is an arithmetic number, because the mean of its divisors is an integer number (61770963).

Almost surely, 2^205903205 is an apocalyptic number.

It is an amenable number.

205903205 is a deficient number, since it is larger than the sum of its proper divisors (41180647).

205903205 is an equidigital number, since it uses as much as digits as its factorization.

205903205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41180646.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 205903205 is about 14349.3276845990. The cubic root of 205903205 is about 590.5015413592.

The spelling of 205903205 in words is "two hundred five million, nine hundred three thousand, two hundred five".