205726071 has 4 divisors (see below), whose sum is σ = 274301432. Its totient is φ = 137150712.

The previous prime is 205726063. The next prime is 205726111. The reversal of 205726071 is 170627502.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 205726071 - 2³ = 205726063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205726051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34287676 + ... + 34287681.

It is an arithmetic number, because the mean of its divisors is an integer number (68575358).

Almost surely, 2^205726071 is an apocalyptic number.

205726071 is a deficient number, since it is larger than the sum of its proper divisors (68575361).

205726071 is an equidigital number, since it uses as much as digits as its factorization.

205726071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68575360.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 205726071 is about 14343.1541510227. The cubic root of 205726071 is about 590.3321609477.

The spelling of 205726071 in words is "two hundred five million, seven hundred twenty-six thousand, seventy-one".