222431323212 has 288 divisors, whose sum is σ = 718529011200. Its totient is φ = 58127715072.

The previous prime is 222431323199. The next prime is 222431323217. The reversal of 222431323212 is 212323134222.

222431323212 is a `hidden beast` number, since 2 + 2 + 24 + 313 + 2 + 321 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

It is not an unprimeable number, because it can be changed into a prime (222431323217) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12070918 + ... + 12089330.

It is an arithmetic number, because the mean of its divisors is an integer number (2494892400).

Almost surely, 2^222431323212 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 222431323212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359264505600).

222431323212 is an abundant number, since it is smaller than the sum of its proper divisors (496097687988).

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

222431323212 is a wasteful number, since it uses less digits than its factorization.

222431323212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18510 (or 18473 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 222431323212 its reverse (212323134222), we get a palindrome (434754457434).

The spelling of 222431323212 in words is "two hundred twenty-two billion, four hundred thirty-one million, three hundred twenty-three thousand, two hundred twelve".