206404245 has 24 divisors (see below), whose sum is σ = 358446816. Its totient is φ = 109873248.

The previous prime is 206404229. The next prime is 206404249. The reversal of 206404245 is 542404602.

It is not a de Polignac number, because 206404245 - 2⁴ = 206404229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206404249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21262 + ... + 29408.

It is an arithmetic number, because the mean of its divisors is an integer number (14935284).

Almost surely, 2^206404245 is an apocalyptic number.

It is an amenable number.

206404245 is a deficient number, since it is larger than the sum of its proper divisors (152042571).

206404245 is a wasteful number, since it uses less digits than its factorization.

206404245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8721 (or 8718 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 206404245 is about 14366.7757343114. The cubic root of 206404245 is about 590.9801242167.

Adding to 206404245 its reverse (542404602), we get a palindrome (748808847).

The spelling of 206404245 in words is "two hundred six million, four hundred four thousand, two hundred forty-five".