206850551 has 2 divisors, whose sum is σ = 206850552. Its totient is φ = 206850550.

The previous prime is 206850547. The next prime is 206850559. The reversal of 206850551 is 155058602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206850551 - 2² = 206850547 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206850559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103425275 + 103425276.

It is an arithmetic number, because the mean of its divisors is an integer number (103425276).

Almost surely, 2^206850551 is an apocalyptic number.

206850551 is a deficient number, since it is larger than the sum of its proper divisors (1).

206850551 is an equidigital number, since it uses as much as digits as its factorization.

206850551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 206850551 is about 14382.2999203883. The cubic root of 206850551 is about 591.4057745325.

The spelling of 206850551 in words is "two hundred six million, eight hundred fifty thousand, five hundred fifty-one".