222002144 has 72 divisors (see below), whose sum is σ = 547584408. Its totient is φ = 87816960.

The previous prime is 222002113. The next prime is 222002147. The reversal of 222002144 is 441200222.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222002147) 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 11 ways as a sum of consecutive naturals, for example, 14939 + ... + 25829.

It is an arithmetic number, because the mean of its divisors is an integer number (7605339).

Almost surely, 2^222002144 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 222002144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273792204).

222002144 is an abundant number, since it is smaller than the sum of its proper divisors (325582264).

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

222002144 is a wasteful number, since it uses less digits than its factorization.

222002144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10928 (or 10913 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 222002144 is about 14899.7363735067. The cubic root of 222002144 is about 605.5068438978.

Adding to 222002144 its reverse (441200222), we get a palindrome (663202366).

The spelling of 222002144 in words is "two hundred twenty-two million, two thousand, one hundred forty-four".