205242213 has 16 divisors (see below), whose sum is σ = 299091456. Its totient is φ = 124157040.

The previous prime is 205242211. The next prime is 205242217. The reversal of 205242213 is 312242502.

It is not a de Polignac number, because 205242213 - 2¹ = 205242211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205242213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205242211) 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, 13056 + ... + 24102.

It is an arithmetic number, because the mean of its divisors is an integer number (18693216).

Almost surely, 2^205242213 is an apocalyptic number.

It is an amenable number.

205242213 is a deficient number, since it is larger than the sum of its proper divisors (93849243).

205242213 is a wasteful number, since it uses less digits than its factorization.

205242213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11624.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 205242213 is about 14326.2770111428. The cubic root of 205242213 is about 589.8689865183.

Adding to 205242213 its reverse (312242502), we get a palindrome (517484715).

The spelling of 205242213 in words is "two hundred five million, two hundred forty-two thousand, two hundred thirteen".