206220305125 has 16 divisors (see below), whose sum is σ = 257992254000. Its totient is φ = 164572838400.

The previous prime is 206220305113. The next prime is 206220305141. The reversal of 206220305125 is 521503022602.

It can be written as a sum of positive squares in 8 ways, for example, as 74340203716 + 131880101409 = 272654^2 + 363153^2 .

It is not a de Polignac number, because 206220305125 - 2²⁹ = 205683434213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206220305093 and 206220305102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1965700 + ... + 2067949.

It is an arithmetic number, because the mean of its divisors is an integer number (16124515875).

Almost surely, 2^206220305125 is an apocalyptic number.

206220305125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

206220305125 is a deficient number, since it is larger than the sum of its proper divisors (51771948875).

206220305125 is an equidigital number, since it uses as much as digits as its factorization.

206220305125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034073 (or 4034063 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 206220305125 its reverse (521503022602), we get a palindrome (727723327727).

The spelling of 206220305125 in words is "two hundred six billion, two hundred twenty million, three hundred five thousand, one hundred twenty-five".