205623213 has 4 divisors (see below), whose sum is σ = 274164288. Its totient is φ = 137082140.

The previous prime is 205623191. The next prime is 205623221. The reversal of 205623213 is 312326502.

205623213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 205623213 - 2⁵ = 205623181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205623293) 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, 34270533 + ... + 34270538.

It is an arithmetic number, because the mean of its divisors is an integer number (68541072).

Almost surely, 2^205623213 is an apocalyptic number.

It is an amenable number.

205623213 is a deficient number, since it is larger than the sum of its proper divisors (68541075).

205623213 is an equidigital number, since it uses as much as digits as its factorization.

205623213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68541074.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 205623213 is about 14339.5680897299. The cubic root of 205623213 is about 590.2337606696.

Adding to 205623213 its reverse (312326502), we get a palindrome (517949715).

The spelling of 205623213 in words is "two hundred five million, six hundred twenty-three thousand, two hundred thirteen".