206620243325 has 6 divisors (see below), whose sum is σ = 256209101754. Its totient is φ = 165296194640.

The previous prime is 206620243307. The next prime is 206620243351. The reversal of 206620243325 is 523342026602.

It can be written as a sum of positive squares in 3 ways, for example, as 179051161 + 206441192164 = 13381^2 + 454358^2 .

It is not a de Polignac number, because 206620243325 - 2¹² = 206620239229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4132404842 + ... + 4132404891.

It is an arithmetic number, because the mean of its divisors is an integer number (42701516959).

Almost surely, 2^206620243325 is an apocalyptic number.

206620243325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

206620243325 is a deficient number, since it is larger than the sum of its proper divisors (49588858429).

206620243325 is an equidigital number, since it uses as much as digits as its factorization.

206620243325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8264809743 (or 8264809738 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 35.

Adding to 206620243325 its reverse (523342026602), we get a palindrome (729962269927).

The spelling of 206620243325 in words is "two hundred six billion, six hundred twenty million, two hundred forty-three thousand, three hundred twenty-five".