22222154112 has 128 divisors (see below), whose sum is σ = 62581455360. Its totient is φ = 6962552832.

The previous prime is 22222154041. The next prime is 22222154113. The reversal of 22222154112 is 21145122222.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222154113) 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, 6415293 + ... + 6418755.

It is an arithmetic number, because the mean of its divisors is an integer number (488917620).

Almost surely, 2^22222154112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22222154112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31290727680).

22222154112 is an abundant number, since it is smaller than the sum of its proper divisors (40359301248).

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

22222154112 is a wasteful number, since it uses less digits than its factorization.

22222154112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4480 (or 4468 counting only the distinct ones).

The product of its digits is 1280, while the sum is 24.

Adding to 22222154112 its reverse (21145122222), we get a palindrome (43367276334).

The spelling of 22222154112 in words is "twenty-two billion, two hundred twenty-two million, one hundred fifty-four thousand, one hundred twelve".