222555520 has 128 divisors (see below), whose sum is σ = 588034080. Its totient is φ = 79872000.

The previous prime is 222555491. The next prime is 222555523. The reversal of 222555520 is 25555222.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222555523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 710884 + ... + 711196.

Almost surely, 2^222555520 is an apocalyptic number.

222555520 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 222555520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294017040).

222555520 is an abundant number, since it is smaller than the sum of its proper divisors (365478560).

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

222555520 is a wasteful number, since it uses less digits than its factorization.

222555520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 222555520 is about 14918.2948087240. The cubic root of 222555520 is about 606.0095341368.

It can be divided in two parts, 2 and 22555520, that added together give a palindrome (22555522).

The spelling of 222555520 in words is "two hundred twenty-two million, five hundred fifty-five thousand, five hundred twenty".