206164520 has 32 divisors (see below), whose sum is σ = 464555520. Its totient is φ = 82344000.

The previous prime is 206164499. The next prime is 206164529. The reversal of 206164520 is 25461602.

It is a self number, because there is not a number n which added to its sum of digits gives 206164520.

It is not an unprimeable number, because it can be changed into a prime (206164529) 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 7 ways as a sum of consecutive naturals, for example, 26609 + ... + 33471.

It is an arithmetic number, because the mean of its divisors is an integer number (14517360).

Almost surely, 2^206164520 is an apocalyptic number.

206164520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206164520 is an abundant number, since it is smaller than the sum of its proper divisors (258391000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206164520 is a wasteful number, since it uses less digits than its factorization.

206164520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7625 (or 7621 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 206164520 is about 14358.4302763220. The cubic root of 206164520 is about 590.7512406916.

The spelling of 206164520 in words is "two hundred six million, one hundred sixty-four thousand, five hundred twenty".