22155240000 has 140 divisors (see below), whose sum is σ = 73250789744. Its totient is φ = 5908032000.

The previous prime is 22155239993. The next prime is 22155240059. The reversal of 22155240000 is 4255122.

It is a happy number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 27687 + ... + 212313.

Almost surely, 2^22155240000 is an apocalyptic number.

22155240000 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 22155240000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36625394872).

22155240000 is an abundant number, since it is smaller than the sum of its proper divisors (51095549744).

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

22155240000 is an equidigital number, since it uses as much as digits as its factorization.

22155240000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184662 (or 184637 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

Adding to 22155240000 its reverse (4255122), we get a palindrome (22159495122).

The spelling of 22155240000 in words is "twenty-two billion, one hundred fifty-five million, two hundred forty thousand".