222012223400 has 96 divisors (see below), whose sum is σ = 563961895200. Its totient is φ = 80608684800.

The previous prime is 222012223399. The next prime is 222012223403. The reversal of 222012223400 is 4322210222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (222012223403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1373234 + ... + 1526366.

It is an arithmetic number, because the mean of its divisors is an integer number (5874603075).

Almost surely, 2^222012223400 is an apocalyptic number.

222012223400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222012223400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281980947600).

222012223400 is an abundant number, since it is smaller than the sum of its proper divisors (341949671800).

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

222012223400 is a wasteful number, since it uses less digits than its factorization.

222012223400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153819 (or 153810 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 222012223400 its reverse (4322210222), we get a palindrome (226334433622).

The spelling of 222012223400 in words is "two hundred twenty-two billion, twelve million, two hundred twenty-three thousand, four hundred".