222100555500 has 192 divisors, whose sum is σ = 720636134400. Its totient is φ = 59060548800.

The previous prime is 222100555489. The next prime is 222100555517. The reversal of 222100555500 is 5555001222.

222100555500 is a `hidden beast` number, since 2 + 2 + 2 + 100 + 5 + 5 + 550 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4823587 + ... + 4869413.

It is an arithmetic number, because the mean of its divisors is an integer number (3753313200).

Almost surely, 2^222100555500 is an apocalyptic number.

222100555500 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 222100555500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360318067200).

222100555500 is an abundant number, since it is smaller than the sum of its proper divisors (498535578900).

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

222100555500 is a wasteful number, since it uses less digits than its factorization.

222100555500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46214 (or 46196 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

Adding to 222100555500 its reverse (5555001222), we get a palindrome (227655556722).

The spelling of 222100555500 in words is "two hundred twenty-two billion, one hundred million, five hundred fifty-five thousand, five hundred".