206428165 has 8 divisors (see below), whose sum is σ = 253474848. Its totient is φ = 161301840.

The previous prime is 206428129. The next prime is 206428237. The reversal of 206428165 is 561824602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 206428165 - 2⁷ = 206428037 is a prime.

It is a super-2 number, since 2×206428165² = 85225174610534450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206428165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479851 + ... + 480280.

It is an arithmetic number, because the mean of its divisors is an integer number (31684356).

Almost surely, 2^206428165 is an apocalyptic number.

It is an amenable number.

206428165 is a deficient number, since it is larger than the sum of its proper divisors (47046683).

206428165 is an equidigital number, since it uses as much as digits as its factorization.

206428165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960179.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 206428165 is about 14367.6081864728. The cubic root of 206428165 is about 591.0029527177.

The spelling of 206428165 in words is "two hundred six million, four hundred twenty-eight thousand, one hundred sixty-five".