212222322 has 64 divisors (see below), whose sum is σ = 537788160. Its totient is φ = 61454592.

The previous prime is 212222321. The next prime is 212222371. The reversal of 212222322 is 223222212.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 212222295 and 212222304.

It is not an unprimeable number, because it can be changed into a prime (212222321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3043 + ... + 20825.

It is an arithmetic number, because the mean of its divisors is an integer number (8402940).

Almost surely, 2^212222322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212222322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268894080).

212222322 is an abundant number, since it is smaller than the sum of its proper divisors (325565838).

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

212222322 is a wasteful number, since it uses less digits than its factorization.

212222322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17824 (or 17818 counting only the distinct ones).

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

The square root of 212222322 is about 14567.8523468629. The cubic root of 212222322 is about 596.4815579390.

Adding to 212222322 its reverse (223222212), we get a palindrome (435444534).

The spelling of 212222322 in words is "two hundred twelve million, two hundred twenty-two thousand, three hundred twenty-two".