22310221 has 4 divisors (see below), whose sum is σ = 22426012. Its totient is φ = 22194432.

The previous prime is 22310219. The next prime is 22310227. The reversal of 22310221 is 12201322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15100996 + 7209225 = 3886^2 + 2685^2 .

It is a cyclic number.

It is not a de Polignac number, because 22310221 - 2¹ = 22310219 is a prime.

It is a super-3 number, since 3×22310221³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22310227) 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 3 ways as a sum of consecutive naturals, for example, 57606 + ... + 57991.

It is an arithmetic number, because the mean of its divisors is an integer number (5606503).

Almost surely, 2^22310221 is an apocalyptic number.

It is an amenable number.

22310221 is a deficient number, since it is larger than the sum of its proper divisors (115791).

22310221 is a wasteful number, since it uses less digits than its factorization.

22310221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115790.

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

The square root of 22310221 is about 4723.3696658212. The cubic root of 22310221 is about 281.5148382084.

Adding to 22310221 its reverse (12201322), we get a palindrome (34511543).

The spelling of 22310221 in words is "twenty-two million, three hundred ten thousand, two hundred twenty-one".