205712233 has 4 divisors (see below), whose sum is σ = 207022660. Its totient is φ = 204401808.

The previous prime is 205712219. The next prime is 205712237. The reversal of 205712233 is 332217502.

205712233 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.

It can be written as a sum of positive squares in 2 ways, for example, as 27008809 + 178703424 = 5197^2 + 13368^2 .

It is a cyclic number.

It is not a de Polignac number, because 205712233 - 2¹⁷ = 205581161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205712198 and 205712207.

It is not an unprimeable number, because it can be changed into a prime (205712237) 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, 654978 + ... + 655291.

It is an arithmetic number, because the mean of its divisors is an integer number (51755665).

Almost surely, 2^205712233 is an apocalyptic number.

It is an amenable number.

205712233 is a deficient number, since it is larger than the sum of its proper divisors (1310427).

205712233 is a wasteful number, since it uses less digits than its factorization.

205712233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310426.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 205712233 is about 14342.6717525013. The cubic root of 205712233 is about 590.3189245770.

Adding to 205712233 its reverse (332217502), we get a palindrome (537929735).

The spelling of 205712233 in words is "two hundred five million, seven hundred twelve thousand, two hundred thirty-three".