206222045 has 8 divisors (see below), whose sum is σ = 255999960. Its totient is φ = 159288640.

The previous prime is 206222039. The next prime is 206222077. The reversal of 206222045 is 540222602.

206222045 = 8290² + 8291² + 8292².

It can be written as a sum of positive squares in 4 ways, for example, as 69939769 + 136282276 = 8363^2 + 11674^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 206222045 - 2¹⁴ = 206205661 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 206222045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 710966 + ... + 711255.

It is an arithmetic number, because the mean of its divisors is an integer number (31999995).

Almost surely, 2^206222045 is an apocalyptic number.

It is an amenable number.

206222045 is a deficient number, since it is larger than the sum of its proper divisors (49777915).

206222045 is a wasteful number, since it uses less digits than its factorization.

206222045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422255.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 206222045 is about 14360.4333151893. The cubic root of 206222045 is about 590.8061803177.

Adding to 206222045 its reverse (540222602), we get a palindrome (746444647).

The spelling of 206222045 in words is "two hundred six million, two hundred twenty-two thousand, forty-five".