205328447 has 4 divisors (see below), whose sum is σ = 205502616. Its totient is φ = 205154280.

The previous prime is 205328443. The next prime is 205328449. The reversal of 205328447 is 744823502.

205328447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744823502 = 2 ⋅372411751.

It is a cyclic number.

It is not a de Polignac number, because 205328447 - 2² = 205328443 is a prime.

It is a super-2 number, since 2×205328447² = 84319542294863618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205328443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85304 + ... + 87677.

It is an arithmetic number, because the mean of its divisors is an integer number (51375654).

Almost surely, 2^205328447 is an apocalyptic number.

205328447 is a deficient number, since it is larger than the sum of its proper divisors (174169).

205328447 is a wasteful number, since it uses less digits than its factorization.

205328447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174168.

The product of its (nonzero) digits is 53760, while the sum is 35.

The square root of 205328447 is about 14329.2863395216. The cubic root of 205328447 is about 589.9515875243.

The spelling of 205328447 in words is "two hundred five million, three hundred twenty-eight thousand, four hundred forty-seven".