205051225 has 12 divisors (see below), whose sum is σ = 261136684. Its totient is φ = 159606720.

The previous prime is 205051201. The next prime is 205051237. The reversal of 205051225 is 522150502.

205051225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 589824 + 204461401 = 768^2 + 14299^2 .

It is a de Polignac number, because none of the positive numbers 2^k-205051225 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205051196 and 205051205.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109914 + ... + 111763.

Almost surely, 2^205051225 is an apocalyptic number.

205051225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205051225 is a deficient number, since it is larger than the sum of its proper divisors (56085459).

205051225 is a wasteful number, since it uses less digits than its factorization.

205051225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221724 (or 221719 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 205051225 is about 14319.6098061365. The cubic root of 205051225 is about 589.6859623424.

The spelling of 205051225 in words is "two hundred five million, fifty-one thousand, two hundred twenty-five".