22115525540 has 24 divisors (see below), whose sum is σ = 46738423032. Its totient is φ = 8789863680.

The previous prime is 22115525507. The next prime is 22115525567. The reversal of 22115525540 is 4552551122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3302111296 + 18813414244 = 57464^2 + 137162^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22115525497 and 22115525506.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3518441 + ... + 3524720.

It is an arithmetic number, because the mean of its divisors is an integer number (1947434293).

Almost surely, 2^22115525540 is an apocalyptic number.

22115525540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22115525540 is an abundant number, since it is smaller than the sum of its proper divisors (24622897492).

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

22115525540 is a wasteful number, since it uses less digits than its factorization.

22115525540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7043327 (or 7043325 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 32.

The spelling of 22115525540 in words is "twenty-two billion, one hundred fifteen million, five hundred twenty-five thousand, five hundred forty".