205226345 has 4 divisors (see below), whose sum is σ = 246271620. Its totient is φ = 164181072.

The previous prime is 205226339. The next prime is 205226369. The reversal of 205226345 is 543622502.

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 83521321 + 121705024 = 9139^2 + 11032^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205226345 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20522630 + ... + 20522639.

It is an arithmetic number, because the mean of its divisors is an integer number (61567905).

Almost surely, 2^205226345 is an apocalyptic number.

It is an amenable number.

205226345 is a deficient number, since it is larger than the sum of its proper divisors (41045275).

205226345 is an equidigital number, since it uses as much as digits as its factorization.

205226345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41045274.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 205226345 is about 14325.7231929142. The cubic root of 205226345 is about 589.8537845086.

Adding to 205226345 its reverse (543622502), we get a palindrome (748848847).

The spelling of 205226345 in words is "two hundred five million, two hundred twenty-six thousand, three hundred forty-five".