212422 has 8 divisors (see below), whose sum is σ = 364176. Its totient is φ = 91032.

The previous prime is 212419. The next prime is 212423. The reversal of 212422 is 224212.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7573 + ... + 7600.

It is an arithmetic number, because the mean of its divisors is an integer number (45522).

2²¹²⁴²² is an apocalyptic number.

212422 is a deficient number, since it is larger than the sum of its proper divisors (151754).

212422 is a wasteful number, since it uses less digits than its factorization.

212422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15182.

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

The square root of 212422 is about 460.8926122211. The cubic root of 212422 is about 59.6668573939. Note that the first 3 decimals are identical.

Adding to 212422 its reverse (224212), we get a palindrome (436634).

The spelling of 212422 in words is "two hundred twelve thousand, four hundred twenty-two", and thus it is an iban number.