206510161 has 16 divisors (see below), whose sum is σ = 243109440. Its totient is φ = 172941120.

The previous prime is 206510149. The next prime is 206510173. The reversal of 206510161 is 161015602.

It is an interprime number because it is at equal distance from previous prime (206510149) and next prime (206510173).

It is not a de Polignac number, because 206510161 - 2⁹ = 206509649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206510111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87351 + ... + 89683.

It is an arithmetic number, because the mean of its divisors is an integer number (15194340).

Almost surely, 2^206510161 is an apocalyptic number.

It is an amenable number.

206510161 is a deficient number, since it is larger than the sum of its proper divisors (36599279).

206510161 is a wasteful number, since it uses less digits than its factorization.

206510161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 206510161 is about 14370.4614052577. The cubic root of 206510161 is about 591.0811937581.

Adding to 206510161 its reverse (161015602), we get a palindrome (367525763).

The spelling of 206510161 in words is "two hundred six million, five hundred ten thousand, one hundred sixty-one".