206006551 has 2 divisors, whose sum is σ = 206006552. Its totient is φ = 206006550.

The previous prime is 206006519. The next prime is 206006557. The reversal of 206006551 is 155600602.

206006551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206006551 - 2⁵ = 206006519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206006557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103003275 + 103003276.

It is an arithmetic number, because the mean of its divisors is an integer number (103003276).

Almost surely, 2^206006551 is an apocalyptic number.

206006551 is a deficient number, since it is larger than the sum of its proper divisors (1).

206006551 is an equidigital number, since it uses as much as digits as its factorization.

206006551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 206006551 is about 14352.9283074918. The cubic root of 206006551 is about 590.6003187842.

The spelling of 206006551 in words is "two hundred six million, six thousand, five hundred fifty-one".