205671712 has 48 divisors (see below), whose sum is σ = 443552760. Its totient is φ = 93442048.

The previous prime is 205671707. The next prime is 205671731. The reversal of 205671712 is 217176502.

It can be written as a sum of positive squares in 4 ways, for example, as 201526416 + 4145296 = 14196^2 + 2036^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9258 + ... + 22294.

Almost surely, 2^205671712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205671712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221776380).

205671712 is an abundant number, since it is smaller than the sum of its proper divisors (237881048).

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

205671712 is a wasteful number, since it uses less digits than its factorization.

205671712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13093 (or 13085 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 205671712 is about 14341.2590800111. The cubic root of 205671712 is about 590.2801618783.

The spelling of 205671712 in words is "two hundred five million, six hundred seventy-one thousand, seven hundred twelve".