222940220436 has 144 divisors (see below), whose sum is σ = 580390574400. Its totient is φ = 72127604736.

The previous prime is 222940220383. The next prime is 222940220443. The reversal of 222940220436 is 634022049222.

222940220436 is a `hidden beast` number, since 2 + 229 + 402 + 20 + 4 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 222940220436.

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 47 ways as a sum of consecutive naturals, for example, 107751610 + ... + 107753678.

It is an arithmetic number, because the mean of its divisors is an integer number (4030490100).

Almost surely, 2^222940220436 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 222940220436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290195287200).

222940220436 is an abundant number, since it is smaller than the sum of its proper divisors (357450353964).

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

222940220436 is a wasteful number, since it uses less digits than its factorization.

222940220436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2758 (or 2753 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

Adding to 222940220436 its reverse (634022049222), we get a palindrome (856962269658).

The spelling of 222940220436 in words is "two hundred twenty-two billion, nine hundred forty million, two hundred twenty thousand, four hundred thirty-six".