22000441521 has 16 divisors (see below), whose sum is σ = 29841260544. Its totient is φ = 14415451344.

The previous prime is 22000441493. The next prime is 22000441543. The reversal of 22000441521 is 12514400022.

It is a de Polignac number, because none of the positive numbers 2^k-22000441521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22000441571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229065 + ... + 310598.

It is an arithmetic number, because the mean of its divisors is an integer number (1865078784).

Almost surely, 2^22000441521 is an apocalyptic number.

It is an amenable number.

22000441521 is a deficient number, since it is larger than the sum of its proper divisors (7840819023).

22000441521 is a wasteful number, since it uses less digits than its factorization.

22000441521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539900.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 22000441521 its reverse (12514400022), we get a palindrome (34514841543).

The spelling of 22000441521 in words is "twenty-two billion, four hundred forty-one thousand, five hundred twenty-one".