206438233 has 16 divisors (see below), whose sum is σ = 215064720. Its totient is φ = 198042624.

The previous prime is 206438209. The next prime is 206438237. The reversal of 206438233 is 332834602.

It can be written as a sum of positive squares in 8 ways, for example, as 12588304 + 193849929 = 3548^2 + 13923^2 .

It is a cyclic number.

It is not a de Polignac number, because 206438233 - 2¹⁷ = 206307161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206438195 and 206438204.

It is not an unprimeable number, because it can be changed into a prime (206438237) 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, 885885 + ... + 886117.

It is an arithmetic number, because the mean of its divisors is an integer number (13441545).

Almost surely, 2^206438233 is an apocalyptic number.

It is an amenable number.

206438233 is a deficient number, since it is larger than the sum of its proper divisors (8626487).

206438233 is a wasteful number, since it uses less digits than its factorization.

206438233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 206438233 is about 14367.9585536707. The cubic root of 206438233 is about 591.0125607751.

The spelling of 206438233 in words is "two hundred six million, four hundred thirty-eight thousand, two hundred thirty-three".