423220212 has 72 divisors (see below), whose sum is σ = 1129652160. Its totient is φ = 133228800.

The previous prime is 423220207. The next prime is 423220223. The reversal of 423220212 is 212022324.

423220212 is a `hidden beast` number, since 423 + 220 + 21 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 273513 + ... + 275055.

Almost surely, 2^423220212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423220212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (564826080).

423220212 is an abundant number, since it is smaller than the sum of its proper divisors (706431948).

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

423220212 is a wasteful number, since it uses less digits than its factorization.

423220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973 (or 1968 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 423220212 is about 20572.3166415453. The cubic root of 423220212 is about 750.7963168733.

Adding to 423220212 its reverse (212022324), we get a palindrome (635242536).

The spelling of 423220212 in words is "four hundred twenty-three million, two hundred twenty thousand, two hundred twelve".