205045231 has 16 divisors (see below), whose sum is σ = 216198720. Its totient is φ = 194261760.

The previous prime is 205045229. The next prime is 205045249. The reversal of 205045231 is 132540502.

It is a cyclic number.

It is not a de Polignac number, because 205045231 - 2¹ = 205045229 is a prime.

It is a super-2 number, since 2×205045231² = 84087093511686722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205045271) 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, 233365 + ... + 234241.

It is an arithmetic number, because the mean of its divisors is an integer number (13512420).

Almost surely, 2^205045231 is an apocalyptic number.

205045231 is a deficient number, since it is larger than the sum of its proper divisors (11153489).

205045231 is an equidigital number, since it uses as much as digits as its factorization.

205045231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 205045231 is about 14319.4005111946. The cubic root of 205045231 is about 589.6802164414.

Adding to 205045231 its reverse (132540502), we get a palindrome (337585733).

The spelling of 205045231 in words is "two hundred five million, forty-five thousand, two hundred thirty-one".