205147843 has 4 divisors (see below), whose sum is σ = 205344088. Its totient is φ = 204951600.

The previous prime is 205147793. The next prime is 205147849. The reversal of 205147843 is 348741502.

205147843 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205147843 is a prime.

It is a super-3 number, since 3×205147843³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205147799 and 205147808.

It is not an unprimeable number, because it can be changed into a prime (205147849) 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, 96546 + ... + 98647.

It is an arithmetic number, because the mean of its divisors is an integer number (51336022).

Almost surely, 2^205147843 is an apocalyptic number.

205147843 is a deficient number, since it is larger than the sum of its proper divisors (196245).

205147843 is a wasteful number, since it uses less digits than its factorization.

205147843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196244.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 205147843 is about 14322.9830342705. The cubic root of 205147843 is about 589.7785657591.

It can be divided in two parts, 2051 and 47843, that added together give a palindrome (49894).

The spelling of 205147843 in words is "two hundred five million, one hundred forty-seven thousand, eight hundred forty-three".