206248057 has 2 divisors, whose sum is σ = 206248058. Its totient is φ = 206248056.

The previous prime is 206248039. The next prime is 206248109. The reversal of 206248057 is 750842602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193460281 + 12787776 = 13909^2 + 3576^2 .

It is a cyclic number.

It is not a de Polignac number, because 206248057 - 2¹¹ = 206246009 is a prime.

It is a super-2 number, since 2×206248057² = 85076522032550498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (216248057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103124028 + 103124029.

It is an arithmetic number, because the mean of its divisors is an integer number (103124029).

Almost surely, 2^206248057 is an apocalyptic number.

It is an amenable number.

206248057 is a deficient number, since it is larger than the sum of its proper divisors (1).

206248057 is an equidigital number, since it uses as much as digits as its factorization.

206248057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 206248057 is about 14361.3389696086. The cubic root of 206248057 is about 590.8310198933.

The spelling of 206248057 in words is "two hundred six million, two hundred forty-eight thousand, fifty-seven".