205124213 has 4 divisors (see below), whose sum is σ = 234427680. Its totient is φ = 175820748.

The previous prime is 205124201. The next prime is 205124287. The reversal of 205124213 is 312421502.

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 a cyclic number.

It is not a de Polignac number, because 205124213 - 2¹² = 205120117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205129213) 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, 14651723 + ... + 14651736.

It is an arithmetic number, because the mean of its divisors is an integer number (58606920).

Almost surely, 2^205124213 is an apocalyptic number.

It is an amenable number.

205124213 is a deficient number, since it is larger than the sum of its proper divisors (29303467).

205124213 is an equidigital number, since it uses as much as digits as its factorization.

205124213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29303466.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 205124213 is about 14322.1581125192. The cubic root of 205124213 is about 589.7559202978.

Adding to 205124213 its reverse (312421502), we get a palindrome (517545715).

The spelling of 205124213 in words is "two hundred five million, one hundred twenty-four thousand, two hundred thirteen".