22521440144 has 20 divisors (see below), whose sum is σ = 49868903424. Its totient is φ = 9652045728.

The previous prime is 22521440101. The next prime is 22521440147. The reversal of 22521440144 is 44104412522.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22521440147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100542032 + ... + 100542255.

Almost surely, 2^22521440144 is an apocalyptic number.

It is an amenable number.

22521440144 is an abundant number, since it is smaller than the sum of its proper divisors (27347463280).

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

22521440144 is a wasteful number, since it uses less digits than its factorization.

22521440144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201084302 (or 201084296 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 29.

Adding to 22521440144 its reverse (44104412522), we get a palindrome (66625852666).

The spelling of 22521440144 in words is "twenty-two billion, five hundred twenty-one million, four hundred forty thousand, one hundred forty-four".