206934551 has 4 divisors (see below), whose sum is σ = 207426504. Its totient is φ = 206442600.

The previous prime is 206934547. The next prime is 206934571. The reversal of 206934551 is 155439602.

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 206934551 - 2² = 206934547 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 (206934571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245345 + ... + 246186.

It is an arithmetic number, because the mean of its divisors is an integer number (51856626).

Almost surely, 2^206934551 is an apocalyptic number.

206934551 is a deficient number, since it is larger than the sum of its proper divisors (491953).

206934551 is an equidigital number, since it uses as much as digits as its factorization.

206934551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491952.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 206934551 is about 14385.2198801409. The cubic root of 206934551 is about 591.4858184124.

The spelling of 206934551 in words is "two hundred six million, nine hundred thirty-four thousand, five hundred fifty-one".