222211601 has 4 divisors (see below), whose sum is σ = 229874100. Its totient is φ = 214549104.

The previous prime is 222211589. The next prime is 222211637. The reversal of 222211601 is 106112222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 106112222 = 2 ⋅53056111.

It can be written as a sum of positive squares in 2 ways, for example, as 109830400 + 112381201 = 10480^2 + 10601^2 .

It is a cyclic number.

It is not a de Polignac number, because 222211601 - 2⁶ = 222211537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222211601.

It is not an unprimeable number, because it can be changed into a prime (222211201) 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, 3831206 + ... + 3831263.

It is an arithmetic number, because the mean of its divisors is an integer number (57468525).

Almost surely, 2^222211601 is an apocalyptic number.

It is an amenable number.

222211601 is a deficient number, since it is larger than the sum of its proper divisors (7662499).

222211601 is an equidigital number, since it uses as much as digits as its factorization.

222211601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7662498.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 222211601 is about 14906.7635991184. The cubic root of 222211601 is about 605.6972141028.

Adding to 222211601 its reverse (106112222), we get a palindrome (328323823).

The spelling of 222211601 in words is "two hundred twenty-two million, two hundred eleven thousand, six hundred one".