206200557 has 12 divisors (see below), whose sum is σ = 302728764. Its totient is φ = 135213120.

The previous prime is 206200549. The next prime is 206200567. The reversal of 206200557 is 755002602.

It can be written as a sum of positive squares in 2 ways, for example, as 95824521 + 110376036 = 9789^2 + 10506^2 .

It is not a de Polignac number, because 206200557 - 2³ = 206200549 is a prime.

It is a super-2 number, since 2×206200557² = 85037339414220498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 206200557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206200567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187248 + ... + 188345.

It is an arithmetic number, because the mean of its divisors is an integer number (25227397).

Almost surely, 2^206200557 is an apocalyptic number.

It is an amenable number.

206200557 is a deficient number, since it is larger than the sum of its proper divisors (96528207).

206200557 is a wasteful number, since it uses less digits than its factorization.

206200557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375660 (or 375657 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 206200557 is about 14359.6851288599. The cubic root of 206200557 is about 590.7856592588.

The spelling of 206200557 in words is "two hundred six million, two hundred thousand, five hundred fifty-seven".