201222845 has 8 divisors (see below), whose sum is σ = 241632600. Its totient is φ = 160868160.

The previous prime is 201222841. The next prime is 201222869. The reversal of 201222845 is 548222102.

It can be written as a sum of positive squares in 4 ways, for example, as 13039321 + 188183524 = 3611^2 + 13718^2 .

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

It is not a de Polignac number, because 201222845 - 2² = 201222841 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201222841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5246 + ... + 20735.

It is an arithmetic number, because the mean of its divisors is an integer number (30204075).

Almost surely, 2^201222845 is an apocalyptic number.

It is an amenable number.

201222845 is a deficient number, since it is larger than the sum of its proper divisors (40409755).

201222845 is a wasteful number, since it uses less digits than its factorization.

201222845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27535.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 201222845 is about 14185.3038388326. The cubic root of 201222845 is about 585.9930002231.

Adding to 201222845 its reverse (548222102), we get a palindrome (749444947).

The spelling of 201222845 in words is "two hundred one million, two hundred twenty-two thousand, eight hundred forty-five".