205502213 has 4 divisors (see below), whose sum is σ = 234859680. Its totient is φ = 176144748.

The previous prime is 205502191. The next prime is 205502221. The reversal of 205502213 is 312205502.

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 205502213 - 2⁸ = 205501957 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 (205502293) 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, 14678723 + ... + 14678736.

It is an arithmetic number, because the mean of its divisors is an integer number (58714920).

Almost surely, 2^205502213 is an apocalyptic number.

It is an amenable number.

205502213 is a deficient number, since it is larger than the sum of its proper divisors (29357467).

205502213 is an equidigital number, since it uses as much as digits as its factorization.

205502213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29357466.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 205502213 is about 14335.3483738624. The cubic root of 205502213 is about 590.1179626242.

Adding to 205502213 its reverse (312205502), we get a palindrome (517707715).

The spelling of 205502213 in words is "two hundred five million, five hundred two thousand, two hundred thirteen".