221633022 has 48 divisors (see below), whose sum is σ = 496603440. Its totient is φ = 65834496.

The previous prime is 221633017. The next prime is 221633023. The reversal of 221633022 is 220336122.

It is a self number, because there is not a number n which added to its sum of digits gives 221633022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221633023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25638 + ... + 33174.

It is an arithmetic number, because the mean of its divisors is an integer number (10345905).

Almost surely, 2^221633022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221633022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248301720).

221633022 is an abundant number, since it is smaller than the sum of its proper divisors (274970418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221633022 is a wasteful number, since it uses less digits than its factorization.

221633022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7597 (or 7584 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 221633022 is about 14887.3443568690. The cubic root of 221633022 is about 605.1710665312.

Adding to 221633022 its reverse (220336122), we get a palindrome (441969144).

The spelling of 221633022 in words is "two hundred twenty-one million, six hundred thirty-three thousand, twenty-two".