206100261 has 16 divisors (see below), whose sum is σ = 306923520. Its totient is φ = 136684800.

The previous prime is 206100253. The next prime is 206100287. The reversal of 206100261 is 162001602.

It is a happy number.

It is not a de Polignac number, because 206100261 - 2³ = 206100253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206100221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14565 + ... + 24986.

It is an arithmetic number, because the mean of its divisors is an integer number (19182720).

Almost surely, 2^206100261 is an apocalyptic number.

It is an amenable number.

206100261 is a deficient number, since it is larger than the sum of its proper divisors (100823259).

206100261 is a wasteful number, since it uses less digits than its factorization.

206100261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39753 (or 39747 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 206100261 is about 14356.1924269634. The cubic root of 206100261 is about 590.6898576294.

Adding to 206100261 its reverse (162001602), we get a palindrome (368101863).

The spelling of 206100261 in words is "two hundred six million, one hundred thousand, two hundred sixty-one".