206551087 has 2 divisors, whose sum is σ = 206551088. Its totient is φ = 206551086.

The previous prime is 206551067. The next prime is 206551097. The reversal of 206551087 is 780155602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206551087 - 2²³ = 198162479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206551067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103275543 + 103275544.

It is an arithmetic number, because the mean of its divisors is an integer number (103275544).

Almost surely, 2^206551087 is an apocalyptic number.

206551087 is a deficient number, since it is larger than the sum of its proper divisors (1).

206551087 is an equidigital number, since it uses as much as digits as its factorization.

206551087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 206551087 is about 14371.8852973436. The cubic root of 206551087 is about 591.1202378274.

The spelling of 206551087 in words is "two hundred six million, five hundred fifty-one thousand, eighty-seven".