222533440 has 56 divisors (see below), whose sum is σ = 533826720. Its totient is φ = 88355328.

The previous prime is 222533431. The next prime is 222533447. The reversal of 222533440 is 44335222.

It is a super-2 number, since 2×222533440² = 99042263836467200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222533447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41979 + ... + 46981.

It is an arithmetic number, because the mean of its divisors is an integer number (9532620).

Almost surely, 2^222533440 is an apocalyptic number.

222533440 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 222533440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266913360).

222533440 is an abundant number, since it is smaller than the sum of its proper divisors (311293280).

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

222533440 is a wasteful number, since it uses less digits than its factorization.

222533440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5159 (or 5149 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 222533440 is about 14917.5547594101. The cubic root of 222533440 is about 605.9894924965.

Adding to 222533440 its reverse (44335222), we get a palindrome (266868662).

The spelling of 222533440 in words is "two hundred twenty-two million, five hundred thirty-three thousand, four hundred forty".