205213471 has 4 divisors (see below), whose sum is σ = 216014200. Its totient is φ = 194412744.

The previous prime is 205213453. The next prime is 205213493. The reversal of 205213471 is 174312502.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 205213471 - 2¹¹ = 205211423 is a prime.

It is a super-3 number, since 3×205213471³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205213271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5400336 + ... + 5400373.

It is an arithmetic number, because the mean of its divisors is an integer number (54003550).

Almost surely, 2^205213471 is an apocalyptic number.

205213471 is a deficient number, since it is larger than the sum of its proper divisors (10800729).

205213471 is a wasteful number, since it uses less digits than its factorization.

205213471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10800728.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 205213471 is about 14325.2738542759. The cubic root of 205213471 is about 589.8414502630.

Adding to 205213471 its reverse (174312502), we get a palindrome (379525973).

The spelling of 205213471 in words is "two hundred five million, two hundred thirteen thousand, four hundred seventy-one".