205288213 has 4 divisors (see below), whose sum is σ = 221079628. Its totient is φ = 189496800.

The previous prime is 205288211. The next prime is 205288273. The reversal of 205288213 is 312882502.

205288213 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.

It can be written as a sum of positive squares in 2 ways, for example, as 45468049 + 159820164 = 6743^2 + 12642^2 .

It is a cyclic number.

It is not a de Polignac number, because 205288213 - 2¹ = 205288211 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 (205288211) 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, 7895688 + ... + 7895713.

It is an arithmetic number, because the mean of its divisors is an integer number (55269907).

Almost surely, 2^205288213 is an apocalyptic number.

It is an amenable number.

205288213 is a deficient number, since it is larger than the sum of its proper divisors (15791415).

205288213 is a wasteful number, since it uses less digits than its factorization.

205288213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15791414.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 205288213 is about 14327.8823627220. The cubic root of 205288213 is about 589.9130514405.

The spelling of 205288213 in words is "two hundred five million, two hundred eighty-eight thousand, two hundred thirteen".