206528851213 has 8 divisors (see below), whose sum is σ = 206991692600. Its totient is φ = 206066515968.

The previous prime is 206528851169. The next prime is 206528851261. The reversal of 206528851213 is 312158825602.

It can be written as a sum of positive squares in 4 ways, for example, as 20592824004 + 185936027209 = 143502^2 + 431203^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206528851213 - 2⁹ = 206528850701 is a prime.

It is a super-2 number, since 2×206528851213² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206528851213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206528851273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696445 + ... + 947677.

It is an arithmetic number, because the mean of its divisors is an integer number (25873961575).

Almost surely, 2^206528851213 is an apocalyptic number.

It is an amenable number.

206528851213 is a deficient number, since it is larger than the sum of its proper divisors (462841387).

206528851213 is a wasteful number, since it uses less digits than its factorization.

206528851213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253071.

The product of its (nonzero) digits is 230400, while the sum is 43.

The spelling of 206528851213 in words is "two hundred six billion, five hundred twenty-eight million, eight hundred fifty-one thousand, two hundred thirteen".