205106650 has 36 divisors (see below), whose sum is σ = 443789118. Its totient is φ = 70321440.

The previous prime is 205106623. The next prime is 205106669. The reversal of 205106650 is 56601502.

It can be written as a sum of positive squares in 3 ways, for example, as 197767969 + 7338681 = 14063^2 + 2709^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 39409 + ... + 44308.

Almost surely, 2^205106650 is an apocalyptic number.

205106650 is an abundant number, since it is smaller than the sum of its proper divisors (238682468).

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

205106650 is a wasteful number, since it uses less digits than its factorization.

205106650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83743 (or 83731 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 205106650 is about 14321.5449585581. The cubic root of 205106650 is about 589.7390879295.

The spelling of 205106650 in words is "two hundred five million, one hundred six thousand, six hundred fifty".