205030471 has 2 divisors, whose sum is σ = 205030472. Its totient is φ = 205030470.

The previous prime is 205030429. The next prime is 205030481. The reversal of 205030471 is 174030502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205030471 - 2⁹ = 205029959 is a prime.

It is a super-3 number, since 3×205030471³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205030411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102515235 + 102515236.

It is an arithmetic number, because the mean of its divisors is an integer number (102515236).

Almost surely, 2^205030471 is an apocalyptic number.

205030471 is a deficient number, since it is larger than the sum of its proper divisors (1).

205030471 is an equidigital number, since it uses as much as digits as its factorization.

205030471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 205030471 is about 14318.8851172150. The cubic root of 205030471 is about 589.6660668986. Note that the first 3 decimals are identical.

Adding to 205030471 its reverse (174030502), we get a palindrome (379060973).

The spelling of 205030471 in words is "two hundred five million, thirty thousand, four hundred seventy-one".