206162551 has 16 divisors (see below), whose sum is σ = 244038400. Its totient is φ = 174053880.

The previous prime is 206162549. The next prime is 206162569. The reversal of 206162551 is 155261602.

It is not a de Polignac number, because 206162551 - 2¹ = 206162549 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 (206162531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18496 + ... + 27466.

It is an arithmetic number, because the mean of its divisors is an integer number (15252400).

Almost surely, 2^206162551 is an apocalyptic number.

206162551 is a deficient number, since it is larger than the sum of its proper divisors (37875849).

206162551 is an frugal number, since it uses more digits than its factorization.

206162551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9059 (or 9045 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 206162551 is about 14358.3617101674. The cubic root of 206162551 is about 590.7493600045.

The spelling of 206162551 in words is "two hundred six million, one hundred sixty-two thousand, five hundred fifty-one".