206450551 has 4 divisors (see below), whose sum is σ = 206581104. Its totient is φ = 206320000.

The previous prime is 206450537. The next prime is 206450579. The reversal of 206450551 is 155054602.

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 206450551 - 2¹¹ = 206448503 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 (206850551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62875 + ... + 66076.

It is an arithmetic number, because the mean of its divisors is an integer number (51645276).

Almost surely, 2^206450551 is an apocalyptic number.

206450551 is a deficient number, since it is larger than the sum of its proper divisors (130553).

206450551 is a wasteful number, since it uses less digits than its factorization.

206450551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130552.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 206450551 is about 14368.3872094261. The cubic root of 206450551 is about 591.0243156195.

The spelling of 206450551 in words is "two hundred six million, four hundred fifty thousand, five hundred fifty-one".