205211125 has 16 divisors (see below), whose sum is σ = 292690944. Its totient is φ = 140715600.

The previous prime is 205211117. The next prime is 205211141. The reversal of 205211125 is 521112502.

It is not a de Polignac number, because 205211125 - 2³ = 205211117 is a prime.

It is a super-2 number, since 2×205211125² = 84223211647531250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116389 + ... + 118138.

It is an arithmetic number, because the mean of its divisors is an integer number (18293184).

Almost surely, 2^205211125 is an apocalyptic number.

205211125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205211125 is a deficient number, since it is larger than the sum of its proper divisors (87479819).

205211125 is an equidigital number, since it uses as much as digits as its factorization.

205211125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234549 (or 234539 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 205211125 is about 14325.1919707905. The cubic root of 205211125 is about 589.8392025657.

Adding to 205211125 its reverse (521112502), we get a palindrome (726323627).

The spelling of 205211125 in words is "two hundred five million, two hundred eleven thousand, one hundred twenty-five".