22115315440 has 20 divisors (see below), whose sum is σ = 51418108584. Its totient is φ = 8846126144.

The previous prime is 22115315413. The next prime is 22115315569. The reversal of 22115315440 is 4451351122.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 22115315399 and 22115315408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138220642 + ... + 138220801.

Almost surely, 2^22115315440 is an apocalyptic number.

22115315440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22115315440 is an abundant number, since it is smaller than the sum of its proper divisors (29302793144).

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

22115315440 is a wasteful number, since it uses less digits than its factorization.

22115315440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276441456 (or 276441450 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 22115315440 its reverse (4451351122), we get a palindrome (26566666562).

The spelling of 22115315440 in words is "twenty-two billion, one hundred fifteen million, three hundred fifteen thousand, four hundred forty".