222220240 has 80 divisors (see below), whose sum is σ = 572195520. Its totient is φ = 79580160.

The previous prime is 222220223. The next prime is 222220241. The reversal of 222220240 is 42022222.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222220241) 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 15 ways as a sum of consecutive naturals, for example, 57076 + ... + 60844.

It is an arithmetic number, because the mean of its divisors is an integer number (7152444).

Almost surely, 2^222220240 is an apocalyptic number.

222220240 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 222220240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286097760).

222220240 is an abundant number, since it is smaller than the sum of its proper divisors (349975280).

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

222220240 is a wasteful number, since it uses less digits than its factorization.

222220240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3860 (or 3854 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 222220240 is about 14907.0533640958. The cubic root of 222220240 is about 605.7050633036.

Adding to 222220240 its reverse (42022222), we get a palindrome (264242462).

The spelling of 222220240 in words is "two hundred twenty-two million, two hundred twenty thousand, two hundred forty".