221622 has 16 divisors (see below), whose sum is σ = 454080. Its totient is φ = 72072.

The previous prime is 221621. The next prime is 221623. The reversal of 221622 is 226122.

It is an interprime number because it is at equal distance from previous prime (221621) and next prime (221623).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221621) 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, 172 + ... + 687.

It is an arithmetic number, because the mean of its divisors is an integer number (28380).

2²²¹⁶²² is an apocalyptic number.

221622 is an abundant number, since it is smaller than the sum of its proper divisors (232458).

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

221622 is a wasteful number, since it uses less digits than its factorization.

221622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907.

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

The square root of 221622 is about 470.7674585185. The cubic root of 221622 is about 60.5161034473.

Adding to 221622 its reverse (226122), we get a palindrome (447744).

The spelling of 221622 in words is "two hundred twenty-one thousand, six hundred twenty-two".