22155387088 has 80 divisors (see below), whose sum is σ = 45995962320. Its totient is φ = 10301644800.

The previous prime is 22155387083. The next prime is 22155387091. The reversal of 22155387088 is 88078355122.

It can be written as a sum of positive squares in 8 ways, for example, as 1920893584 + 20234493504 = 43828^2 + 142248^2 .

It is a super-2 number, since 2×22155387088² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22155387083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13666918 + ... + 13668538.

It is an arithmetic number, because the mean of its divisors is an integer number (574949529).

Almost surely, 2^22155387088 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 22155387088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22997981160).

22155387088 is an abundant number, since it is smaller than the sum of its proper divisors (23840575232).

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

22155387088 is a wasteful number, since it uses less digits than its factorization.

22155387088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216 (or 2210 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 49.

The spelling of 22155387088 in words is "twenty-two billion, one hundred fifty-five million, three hundred eighty-seven thousand, eighty-eight".