422 has 4 divisors (see below), whose sum is σ = 636. Its totient is φ = 210.

The previous prime is 421. The next prime is 431. The reversal of 422 is 224.

Subtracting from 422 its product of digits (16), we obtain a triangular number (406 = T_{28}).

Adding to 422 its reverse (224), we get a palindrome (646).

It can be divided in two parts, 42 and 2, that added together give a palindrome (44).

422 is nontrivially palindromic in base 8, base 12 and base 14.

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

422 is an undulating number in base 8 and base 12.

422 is a modest number, since divided by 22 gives 4 as remainder.

422 is a nontrivial repdigit in base 14.

It is a plaindrome in base 13 and base 14.

It is a nialpdrome in base 10 and base 14.

It is a zygodrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number *n* which divided by its sum of digits gives 422.

It is not an unprimeable number, because it can be changed into a prime (421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104 + ... + 107.

It is an arithmetic number, because the mean of its divisors is an integer number (159).

422 is a deficient number, since it is larger than the sum of its proper divisors (214).

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

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

The sum of its prime factors is 213.

The product of its digits is 16, while the sum is 8.

The square root of 422 is about 20.5426385842. The cubic root of 422 is about 7.5007406676.

The spelling of 422 in words is "four hundred twenty-two", and thus it is an aban number and an iban number.

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