206228111 has 4 divisors (see below), whose sum is σ = 208354272. Its totient is φ = 204101952.

The previous prime is 206228107. The next prime is 206228159. The reversal of 206228111 is 111822602.

206228111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111822602 = 2 ⋅55911301.

It is a cyclic number.

It is not a de Polignac number, because 206228111 - 2² = 206228107 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 (206228311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1062935 + ... + 1063128.

It is an arithmetic number, because the mean of its divisors is an integer number (52088568).

Almost surely, 2^206228111 is an apocalyptic number.

206228111 is a deficient number, since it is larger than the sum of its proper divisors (2126161).

206228111 is an equidigital number, since it uses as much as digits as its factorization.

206228111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126160.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 206228111 is about 14360.6445189622. The cubic root of 206228111 is about 590.8119730950.

The spelling of 206228111 in words is "two hundred six million, two hundred twenty-eight thousand, one hundred eleven".