205047061 has 2 divisors, whose sum is σ = 205047062. Its totient is φ = 205047060.

The previous prime is 205047049. The next prime is 205047071. The reversal of 205047061 is 160740502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178730161 + 26316900 = 13369^2 + 5130^2 .

It is a cyclic number.

It is not a de Polignac number, because 205047061 - 2¹⁷ = 204915989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205047071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102523530 + 102523531.

It is an arithmetic number, because the mean of its divisors is an integer number (102523531).

Almost surely, 2^205047061 is an apocalyptic number.

It is an amenable number.

205047061 is a deficient number, since it is larger than the sum of its proper divisors (1).

205047061 is an equidigital number, since it uses as much as digits as its factorization.

205047061 is an evil number, because the sum of its binary digits is even.

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

The square root of 205047061 is about 14319.4644103751. The cubic root of 205047061 is about 589.6819707074.

Adding to 205047061 its reverse (160740502), we get a palindrome (365787563).

The spelling of 205047061 in words is "two hundred five million, forty-seven thousand, sixty-one".