222310221 has 16 divisors (see below), whose sum is σ = 343816704. Its totient is φ = 125137584.

The previous prime is 222310219. The next prime is 222310229. The reversal of 222310221 is 122013222.

222310221 = T₁₆₄ + T₁₆₅ + ... + T₁₁₀₁.

It is a happy number.

It is not a de Polignac number, because 222310221 - 2¹ = 222310219 is a prime.

It is a super-2 number, since 2×222310221² = 98843668722137682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 222310221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222310229) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 77595 + ... + 80408.

It is an arithmetic number, because the mean of its divisors is an integer number (21488544).

Almost surely, 2^222310221 is an apocalyptic number.

222310221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222310221 is a deficient number, since it is larger than the sum of its proper divisors (121506483).

222310221 is a wasteful number, since it uses less digits than its factorization.

222310221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158080.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 222310221 is about 14910.0711265909. The cubic root of 222310221 is about 605.7868059218.

Adding to 222310221 its reverse (122013222), we get a palindrome (344323443).

The spelling of 222310221 in words is "two hundred twenty-two million, three hundred ten thousand, two hundred twenty-one".