206513141 has 4 divisors (see below), whose sum is σ = 207370284. Its totient is φ = 205656000.

The previous prime is 206513107. The next prime is 206513143. The reversal of 206513141 is 141315602.

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

It can be written as a sum of positive squares in 2 ways, for example, as 141372100 + 65141041 = 11890^2 + 8071^2 .

It is a cyclic number.

It is not a de Polignac number, because 206513141 - 2⁶ = 206513077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206513143) 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, 428210 + ... + 428691.

It is an arithmetic number, because the mean of its divisors is an integer number (51842571).

Almost surely, 2^206513141 is an apocalyptic number.

It is an amenable number.

206513141 is a deficient number, since it is larger than the sum of its proper divisors (857143).

206513141 is an equidigital number, since it uses as much as digits as its factorization.

206513141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857142.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 206513141 is about 14370.5650897938. The cubic root of 206513141 is about 591.0840369007.

Adding to 206513141 its reverse (141315602), we get a palindrome (347828743).

The spelling of 206513141 in words is "two hundred six million, five hundred thirteen thousand, one hundred forty-one".