222443621 has 8 divisors (see below), whose sum is σ = 239134080. Its totient is φ = 206251488.

The previous prime is 222443609. The next prime is 222443651. The reversal of 222443621 is 126344222.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222443621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222443651) 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, 123656 + ... + 125441.

It is an arithmetic number, because the mean of its divisors is an integer number (29891760).

Almost surely, 2^222443621 is an apocalyptic number.

It is an amenable number.

222443621 is a deficient number, since it is larger than the sum of its proper divisors (16690459).

222443621 is a wasteful number, since it uses less digits than its factorization.

222443621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249163.

The product of its digits is 4608, while the sum is 26.

The square root of 222443621 is about 14914.5439420721. The cubic root of 222443621 is about 605.9079516506.

Adding to 222443621 its reverse (126344222), we get a palindrome (348787843).

The spelling of 222443621 in words is "two hundred twenty-two million, four hundred forty-three thousand, six hundred twenty-one".