221422 has 4 divisors (see below), whose sum is σ = 332136. Its totient is φ = 110710.

The previous prime is 221413. The next prime is 221447. The reversal of 221422 is 224122.

221422 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 224122 = 2 ⋅112061.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

221422 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55354 + ... + 55357.

It is an arithmetic number, because the mean of its divisors is an integer number (83034).

2²²¹⁴²² is an apocalyptic number.

221422 is a deficient number, since it is larger than the sum of its proper divisors (110714).

221422 is a wasteful number, since it uses less digits than its factorization.

221422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110713.

The product of its digits is 64, while the sum is 13.

The square root of 221422 is about 470.5549914728. The cubic root of 221422 is about 60.4978939685.

Adding to 221422 its reverse (224122), we get a palindrome (445544).

It can be divided in two parts, 22 and 1422, that added together give a square (1444 = 38²).

The spelling of 221422 in words is "two hundred twenty-one thousand, four hundred twenty-two", and thus it is an iban number.