222143440 has 80 divisors (see below), whose sum is σ = 549429120. Its totient is φ = 83289600.

The previous prime is 222143431. The next prime is 222143503. The reversal of 222143440 is 44341222.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152797 + ... + 154243.

It is an arithmetic number, because the mean of its divisors is an integer number (6867864).

Almost surely, 2^222143440 is an apocalyptic number.

222143440 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 222143440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274714560).

222143440 is an abundant number, since it is smaller than the sum of its proper divisors (327285680).

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

222143440 is a wasteful number, since it uses less digits than its factorization.

222143440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580 (or 1574 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 222143440 is about 14904.4771796934. The cubic root of 222143440 is about 605.6352774179.

Adding to 222143440 its reverse (44341222), we get a palindrome (266484662).

The spelling of 222143440 in words is "two hundred twenty-two million, one hundred forty-three thousand, four hundred forty".