205538233 has 4 divisors (see below), whose sum is σ = 205984548. Its totient is φ = 205091920.

The previous prime is 205538231. The next prime is 205538239. The reversal of 205538233 is 332835502.

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 103063104 + 102475129 = 10152^2 + 10123^2 .

It is a cyclic number.

It is not a de Polignac number, because 205538233 - 2¹ = 205538231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205538195 and 205538204.

It is not an unprimeable number, because it can be changed into a prime (205538231) 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 3 ways as a sum of consecutive naturals, for example, 222466 + ... + 223387.

It is an arithmetic number, because the mean of its divisors is an integer number (51496137).

Almost surely, 2^205538233 is an apocalyptic number.

It is an amenable number.

205538233 is a deficient number, since it is larger than the sum of its proper divisors (446315).

205538233 is an equidigital number, since it uses as much as digits as its factorization.

205538233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446314.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 205538233 is about 14336.6046538223. The cubic root of 205538233 is about 590.1524388259.

The spelling of 205538233 in words is "two hundred five million, five hundred thirty-eight thousand, two hundred thirty-three".