222001213 has 6 divisors (see below), whose sum is σ = 258246366. Its totient is φ = 190286712.

The previous prime is 222001201. The next prime is 222001223. The reversal of 222001213 is 312100222.

It can be written as a sum of positive squares in only one way, i.e., 199741689 + 22259524 = 14133^2 + 4718^2 .

It is a de Polignac number, because none of the positive numbers 2^k-222001213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222001193 and 222001202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222001223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2265270 + ... + 2265367.

It is an arithmetic number, because the mean of its divisors is an integer number (43041061).

Almost surely, 2^222001213 is an apocalyptic number.

It is an amenable number.

222001213 is a deficient number, since it is larger than the sum of its proper divisors (36245153).

222001213 is an equidigital number, since it uses as much as digits as its factorization.

222001213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4530651 (or 4530644 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 222001213 is about 14899.7051313105. The cubic root of 222001213 is about 605.5059974681.

Adding to 222001213 its reverse (312100222), we get a palindrome (534101435).

Subtracting 222001213 from its reverse (312100222), we obtain a palindrome (90099009).

The spelling of 222001213 in words is "two hundred twenty-two million, one thousand, two hundred thirteen".