206102551 has 4 divisors (see below), whose sum is σ = 208418400. Its totient is φ = 203786704.

The previous prime is 206102537. The next prime is 206102573. The reversal of 206102551 is 155201602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 206102551 - 2⁷ = 206102423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206102581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157791 + ... + 1157968.

It is an arithmetic number, because the mean of its divisors is an integer number (52104600).

Almost surely, 2^206102551 is an apocalyptic number.

206102551 is a deficient number, since it is larger than the sum of its proper divisors (2315849).

206102551 is an equidigital number, since it uses as much as digits as its factorization.

206102551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315848.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 206102551 is about 14356.2721832654. The cubic root of 206102551 is about 590.6920453588.

The spelling of 206102551 in words is "two hundred six million, one hundred two thousand, five hundred fifty-one".