22224221550 has 144 divisors (see below), whose sum is σ = 63384871680. Its totient is φ = 5563422720.

The previous prime is 22224221531. The next prime is 22224221573. The reversal of 22224221550 is 5512242222.

It is a happy number.

22224221550 is a `hidden beast` number, since 2 + 222 + 422 + 15 + 5 + 0 = 666.

It is a super-3 number, since 3×22224221550³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3125299 + ... + 3132401.

It is an arithmetic number, because the mean of its divisors is an integer number (440172720).

Almost surely, 2^22224221550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22224221550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31692435840).

22224221550 is an abundant number, since it is smaller than the sum of its proper divisors (41160650130).

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

22224221550 is a wasteful number, since it uses less digits than its factorization.

22224221550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7547 (or 7539 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 22224221550 its reverse (5512242222), we get a palindrome (27736463772).

The spelling of 22224221550 in words is "twenty-two billion, two hundred twenty-four million, two hundred twenty-one thousand, five hundred fifty".