205324257 has 4 divisors (see below), whose sum is σ = 273765680. Its totient is φ = 136882836.

The previous prime is 205324237. The next prime is 205324271. The reversal of 205324257 is 752423502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 205324257 - 2⁸ = 205324001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205324237) 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, 34220707 + ... + 34220712.

It is an arithmetic number, because the mean of its divisors is an integer number (68441420).

Almost surely, 2^205324257 is an apocalyptic number.

It is an amenable number.

205324257 is a deficient number, since it is larger than the sum of its proper divisors (68441423).

205324257 is an equidigital number, since it uses as much as digits as its factorization.

205324257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68441422.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 205324257 is about 14329.1401347045. The cubic root of 205324257 is about 589.9475745815.

Adding to 205324257 its reverse (752423502), we get a palindrome (957747759).

The spelling of 205324257 in words is "two hundred five million, three hundred twenty-four thousand, two hundred fifty-seven".