22228015540 has 12 divisors (see below), whose sum is σ = 46678832676. Its totient is φ = 8891206208.

The previous prime is 22228015501. The next prime is 22228015567. The reversal of 22228015540 is 4551082222.

It can be written as a sum of positive squares in 2 ways, for example, as 7773243556 + 14454771984 = 88166^2 + 120228^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555700369 + ... + 555700408.

It is an arithmetic number, because the mean of its divisors is an integer number (3889902723).

Almost surely, 2^22228015540 is an apocalyptic number.

22228015540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22228015540 is an abundant number, since it is smaller than the sum of its proper divisors (24450817136).

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

22228015540 is a wasteful number, since it uses less digits than its factorization.

22228015540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111400786 (or 1111400784 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 31.

Adding to 22228015540 its reverse (4551082222), we get a palindrome (26779097762).

The spelling of 22228015540 in words is "twenty-two billion, two hundred twenty-eight million, fifteen thousand, five hundred forty".