206102245 has 4 divisors (see below), whose sum is σ = 247322700. Its totient is φ = 164881792.

The previous prime is 206102233. The next prime is 206102249. The reversal of 206102245 is 542201602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 542201602 = 2 ⋅271100801.

It can be written as a sum of positive squares in 2 ways, for example, as 70006689 + 136095556 = 8367^2 + 11666^2 .

It is a cyclic number.

It is not a de Polignac number, because 206102245 - 2²¹ = 204005093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206102249) 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, 20610220 + ... + 20610229.

It is an arithmetic number, because the mean of its divisors is an integer number (61830675).

Almost surely, 2^206102245 is an apocalyptic number.

It is an amenable number.

206102245 is a deficient number, since it is larger than the sum of its proper divisors (41220455).

206102245 is an equidigital number, since it uses as much as digits as its factorization.

206102245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41220454.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 206102245 is about 14356.2615258987. The cubic root of 206102245 is about 590.6917530256.

Adding to 206102245 its reverse (542201602), we get a palindrome (748303847).

The spelling of 206102245 in words is "two hundred six million, one hundred two thousand, two hundred forty-five".