206100045 has 40 divisors (see below), whose sum is σ = 372455424. Its totient is φ = 109027296.

The previous prime is 206100017. The next prime is 206100047. The reversal of 206100045 is 540001602.

It is a happy number.

It is not a de Polignac number, because 206100045 - 2⁶ = 206099981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206100047) 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 39 ways as a sum of consecutive naturals, for example, 49432 + ... + 53438.

Almost surely, 2^206100045 is an apocalyptic number.

It is an amenable number.

206100045 is a deficient number, since it is larger than the sum of its proper divisors (166355379).

206100045 is a wasteful number, since it uses less digits than its factorization.

206100045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4151 (or 4142 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 206100045 is about 14356.1849040753. The cubic root of 206100045 is about 590.6896512751.

Adding to 206100045 its reverse (540001602), we get a palindrome (746101647).

The spelling of 206100045 in words is "two hundred six million, one hundred thousand, forty-five".