221230422 has 96 divisors (see below), whose sum is σ = 578253312. Its totient is φ = 59761152.

The previous prime is 221230417. The next prime is 221230423. The reversal of 221230422 is 224032122.

221230422 is a `hidden beast` number, since 2 + 212 + 30 + 422 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 221230395 and 221230404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221230423) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 280713 + ... + 281499.

It is an arithmetic number, because the mean of its divisors is an integer number (6023472).

Almost surely, 2^221230422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221230422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289126656).

221230422 is an abundant number, since it is smaller than the sum of its proper divisors (357022890).

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

221230422 is a wasteful number, since it uses less digits than its factorization.

221230422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 919 counting only the distinct ones).

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

The square root of 221230422 is about 14873.8166588136. The cubic root of 221230422 is about 604.8044100575.

Adding to 221230422 its reverse (224032122), we get a palindrome (445262544).

The spelling of 221230422 in words is "two hundred twenty-one million, two hundred thirty thousand, four hundred twenty-two".