205147206 has 96 divisors (see below), whose sum is σ = 501295392. Its totient is φ = 60103680.

The previous prime is 205147171. The next prime is 205147213. The reversal of 205147206 is 602741502.

It is a super-2 number, since 2×205147206² = 84170752259212872, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 205147206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1185736 + ... + 1185908.

It is an arithmetic number, because the mean of its divisors is an integer number (5221827).

Almost surely, 2^205147206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205147206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250647696).

205147206 is an abundant number, since it is smaller than the sum of its proper divisors (296148186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205147206 is a wasteful number, since it uses less digits than its factorization.

205147206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 205147206 is about 14322.9607972653. The cubic root of 205147206 is about 589.7779553224. Note that the first 3 decimals are identical.

Adding to 205147206 its reverse (602741502), we get a palindrome (807888708).

The spelling of 205147206 in words is "two hundred five million, one hundred forty-seven thousand, two hundred six".