205134643 has 8 divisors (see below), whose sum is σ = 238283360. Its totient is φ = 172946880.

The previous prime is 205134641. The next prime is 205134653. The reversal of 205134643 is 346431502.

205134643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205134643 - 2¹ = 205134641 is a prime.

It is a super-3 number, since 3×205134643³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (205134641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239778 + ... + 240631.

It is an arithmetic number, because the mean of its divisors is an integer number (29785420).

Almost surely, 2^205134643 is an apocalyptic number.

205134643 is a deficient number, since it is larger than the sum of its proper divisors (33148717).

205134643 is an equidigital number, since it uses as much as digits as its factorization.

205134643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480477.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 205134643 is about 14322.5222289930. The cubic root of 205134643 is about 589.7659159485.

The spelling of 205134643 in words is "two hundred five million, one hundred thirty-four thousand, six hundred forty-three".